butanoyl-CoA

Three steps

• an all-trans-retinyl esterReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. all-trans-retinol + an acyl-CoA = an all-trans-retinyl ester + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 7 morecytosol, Golgi apparatusOne of 4 routes

• 18-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoateReach from here →
  1. transport of butyryl-CoA and L-carnitine (cytosol to mitochondria)
  2. Utilized Transport
  3. cytochrome P450 (arachidonate)

  Catalysed by SLC33A1, ESCO2, OXSM, CYP4F8mitochondrial matrix, cytosol, endoplasmic reticulumOne of 2 routes

• 1-O-hexadecyl-sn-glycero-3-phosphocholineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. 1-O-hexadecyl-2-acetyl-sn-glycero-3-phosphocholine + sphing-4-enine = 1-O-hexadecyl-sn-glycero-3-phosphocholine + N-(acetyl)-sphing-4-enine + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 4 morecytosol, Golgi apparatus

• a 1,2-diacyl-sn-glycero-3-phosphoethanolamineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. a 1-acyl-sn-glycero-3-phosphoethanolamine + an acyl-CoA = a 1,2-diacyl-sn-glycero-3-phosphoethanolamine + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 7 morecytosol, Golgi apparatus

• a triacyl-sn-glycerolReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. an acyl-CoA + a 1,2-diacyl-sn-glycerol = a triacyl-sn-glycerol + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 9 morecytosol, Golgi apparatus

• a 1,2-diacyl-sn-glycero-3-phospho-(1'-sn-glycerol)Reach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. 1-acyl-sn-glycero-3-phospho-(1'-sn-glycerol) + an acyl-CoA = a 1,2-diacyl-sn-glycero-3-phospho-(1'-sn-glycerol) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 6 morecytosol, Golgi apparatus

• 1-octadecanoyl-2-acyl-sn-glycero-3-phospho-1D-myo-inositolReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. a 2-acyl-sn-glycero-3-phospho-D-myo-inositol + octadecanoyl-CoA = 1-octadecanoyl-2-acyl-sn-glycero-3-phospho-1D-myo-inositol + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 7 morecytosol

• 3-oxoeicosasphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. octadecanoyl-CoA + L-serine + H(+) = 3-oxoeicosasphinganine + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• 3-oxoeicosanoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. very-long-chain 3-oxoacyl-CoA synthase (malonyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 13 morecytosolOne of 2 routes

• N-docosanoylsphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (behenic acid)
  3. docosanoyl-CoA + sphinganine = N-docosanoylsphinganine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 10 morecytosol

• N-eicosanoylsphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (eicosanoate)
  3. eicosanoyl-CoA + sphinganine = N-eicosanoylsphinganine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 10 morecytosol

• N-(octadecanoyl)-sphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. sphinganine + octadecanoyl-CoA = N-(octadecanoyl)-sphinganine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 12 morecytosol

• N-(tetradecanoyl)-sphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (myristic acid)
  3. sphinganine + tetradecanoyl-CoA = N-(tetradecanoyl)-sphinganine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• 3-oxohexadecasphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (myristic acid)
  3. tetradecanoyl-CoA + L-serine + H(+) = 3-oxohexadecasphinganine + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• 3-oxotetradecasphinganineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (lauric acid)
  3. dodecanoyl-CoA + L-serine + H(+) = 3-oxotetradecasphinganine + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• Mo-molybdopterinReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. amino-acid N-acetyltransferase (N-acetyl-L-alanine)
  3. Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O

  Catalysed by CPT1A, CPT1C, CPT1B, MOCOScytosol, mitochondrial matrix

• 3-oxooctadecanoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. Palmitate:CoA ligase (AMP-forming)
  3. very-long-chain 3-oxoacyl-CoA synthase (malonyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 14 morecytosolOne of 2 routes

• 3-oxodocosanoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (eicosanoate)
  3. very-long-chain 3-oxoacyl-CoA synthase (eicosanoyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 14 morecytosolOne of 3 routes

• 3-oxo-(8Z,11Z,14Z)-eicosatrienoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (gamma-linolenate)
  3. (6Z,9Z,12Z)-octadecatrienoyl-CoA + malonyl-CoA + H(+) = 3-oxo-(8Z,11Z,14Z)-eicosatrienoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• 3-oxo-(8Z,11Z,14Z,17Z)-eicosatetraenoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearidonic acid)
  3. (6Z,9Z,12Z,15Z)-octadecatetraenoyl-CoA + malonyl-CoA + H(+) = 3-oxo-(8Z,11Z,14Z,17Z)-eicosatetraenoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• (4S)-4-hydroxy-2-oxoglutarateReach from here →
  1. Butyryl-CoA hydrolase
  2. transport of butyrate and pyruvate (cytosol to extracellular)
  3. (4S)-4-hydroxy-2-oxoglutarate = glyoxylate + pyruvate

  Catalysed by ACOT12, SLC16A4, SLC16A5, SLC16A3 and 4 morecytosol, extracellular space

• 1-dodecanoyl-sn-glycerol 3-phosphateReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (lauric acid)
  3. glycerol-3-phosphate 1-O-acyltransferase (lauroyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 11 morecytosolOne of 2 routes

• 1-tetradecanoyl-sn-glycerol 3-phosphateReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (myristic acid)
  3. glycerol-3-phosphate 1-O-acyltransferase (myristoyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 11 morecytosol

• 1-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1'-sn-glycerol)Reach from here →
  1. transport of butyryl-CoA and L-carnitine (cytosol to mitochondria)
  2. Utilized Transport
  3. 1-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1'-sn-glycerol) + H2O = sn-glycero-3-phospho-(1'-sn-glycerol) + (9Z)-octadecenoate + H(+)

  Catalysed by SLC33A1, ESCO2, OXSM, ABHD12mitochondrial matrix, cytosol, endoplasmic reticulum

• 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol)Reach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. 1-hexadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol) + octadecanoyl-CoA = 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 7 morecytosol

• 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1D-myo-inositol)Reach from here →
  1. transport of butyryl-CoA and L-carnitine (cytosol to mitochondria)
  2. Utilized Transport
  3. 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1D-myo-inositol) + H2O = 1-hexadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol) + (9Z)-octadecenoate + H(+)

  Catalysed by SLC33A1, ESCO2, OXSM, ABHD16Amitochondrial matrix, cytosol, endoplasmic reticulum

• 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phospho-(1D-myo-inositol)Reach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
  3. 1-hexadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol) + (9Z,12Z)-octadecadienoyl-CoA = 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phospho-(1D-myo-inositol) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol)Reach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. 1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + octadecanoyl-CoA = 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phospho-(1'-sn-glycerol)Reach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
  3. 1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + (9Z,12Z)-octadecadienoyl-CoA = 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phospho-(1'-sn-glycerol) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphateReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. 1-hexadecanoyl-sn-glycero-3-phosphate + octadecanoyl-CoA = 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphate + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 7 morecytosol

• 1-hexadecanoyl-2-tetradecanoyl-sn-glycero-3-phosphateReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (myristic acid)
  3. 1-hexadecanoyl-sn-glycero-3-phosphate + tetradecanoyl-CoA = 1-hexadecanoyl-2-tetradecanoyl-sn-glycero-3-phosphate + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• N-dodecanoylsphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. N-dodecanoylsphing-4-enine + H2O = dodecanoate + sphing-4-enine

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 4 morecytosol, Golgi apparatus

• N-tetradecanoylsphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. N-tetradecanoylsphing-4-enine + H2O = sphing-4-enine + tetradecanoate

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 3 morecytosol, Golgi apparatus

• N-hexadecanoylsphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. acyl-CoA:sphingosine N-acyltransferase
  3. sphing-4-enine + hexadecanoyl-CoA = N-hexadecanoylsphing-4-enine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, ASAH1 and 7 morecytosol, Golgi apparatusOne of 2 routes

• N-octadecanoylsphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. sphing-4-enine + octadecanoyl-CoA = N-octadecanoylsphing-4-enine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 10 morecytosolOne of 3 routes

• N-eicosanoyl-sphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (eicosanoate)
  3. eicosanoyl-CoA + sphing-4-enine = N-eicosanoyl-sphing-4-enine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosolOne of 2 routes

• N-tetracosanoyl-sphing-4-enineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (lignocerate)
  3. tetracosanoyl-CoA + sphing-4-enine = N-tetracosanoyl-sphing-4-enine + CoA + H(+)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosolOne of 2 routes

• 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphocholineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (stearate)
  3. octadecanoyl-CoA + 1-hexadecanoyl-sn-glycero-3-phosphocholine = 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphocholine + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 7 morecytosol

• 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
  3. (9Z,12Z)-octadecadienoyl-CoA + 1-hexadecanoyl-sn-glycero-3-phosphocholine = 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 10 morecytosol

• (9Z,12Z)-octadecadien-1-olReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
  3. (9Z,12Z)-octadecadienoyl-CoA + 2 NADPH + 2 H(+) = (9Z,12Z)-octadecadien-1-ol + 2 NADP(+) + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 3-oxo-(7Z,10Z,13Z,16Z,19Z)-docosapentaenoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (EPA)
  3. (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl-CoA + malonyl-CoA + H(+) = 3-oxo-(7Z,10Z,13Z,16Z,19Z)-docosapentaenoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• (9Z,12Z,15Z,18Z,21Z)-3-oxotetracosapentaenoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (DPA)
  3. (7Z,10Z,13Z,16Z,19Z)-docosapentaenoyl-CoA + malonyl-CoA + H(+) = (9Z,12Z,15Z,18Z,21Z)-3-oxotetracosapentaenoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 3-oxooctacosanyol-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (cerotic acid)
  3. hexacosanoyl-CoA + malonyl-CoA + H(+) = 3-oxooctacosanyol-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• 3-oxotetracosanoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (behenic acid)
  3. very-long-chain 3-oxoacyl-CoA synthase (docosanoyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 14 morecytosolOne of 3 routes

• 3-oxohexacosanoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (lignocerate)
  3. very-long-chain 3-oxoacyl-CoA synthase (malonyl-CoA)

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 14 morecytosolOne of 3 routes

• 1-hexadecanoyl-2-[(9Z)-hexadec-9-enoyl]-sn-glycero-3-phosphateReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (palmitolate)
  3. 1-hexadecanoyl-sn-glycero-3-phosphate + (9Z)-hexadecenoyl-CoA = 1-hexadecanoyl-2-[(9Z)-hexadec-9-enoyl]-sn-glycero-3-phosphate + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 1-hexadecanoyl-2-(9Z)-hexadecenoyl-sn-glycero-3-phosphoethanolamineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (palmitolate)
  3. 1-hexadecanoyl-sn-glycero-3-phosphoethanolamine + (9Z)-hexadecenoyl-CoA = 1-hexadecanoyl-2-(9Z)-hexadecenoyl-sn-glycero-3-phosphoethanolamine + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 8 morecytosol

• 1-hexadecanoyl-2-(9Z-hexadecenoyl)-sn-glycero-3-phosphocholineReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (palmitolate)
  3. (9Z)-hexadecenoyl-CoA + 1-hexadecanoyl-sn-glycero-3-phosphocholine = 1-hexadecanoyl-2-(9Z-hexadecenoyl)-sn-glycero-3-phosphocholine + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 9 morecytosol

• (11Z,14Z)-3-oxoicosa-11,14-dienoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
  3. (9Z,12Z)-octadecadienoyl-CoA + malonyl-CoA + H(+) = (11Z,14Z)-3-oxoicosa-11,14-dienoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 11 morecytosol

• (11Z,14Z,17Z)-3-oxoeicosatrienoyl-CoAReach from here →
  1. carnitine O-palmitoyltransferase (butyryl-CoA)
  2. long-chain-fatty-acid-CoA ligase (linolenate)
  3. (9Z,12Z,15Z)-octadecatrienoyl-CoA + malonyl-CoA + H(+) = (11Z,14Z,17Z)-3-oxoeicosatrienoyl-CoA + CO2 + CoA

  Catalysed by CPT1A, CPT1C, CPT1B, SLC27A2 and 11 morecytosol