Compound

alpha-lactose

A disaccharide of glucose and galactose in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry.

Definition from MeSH (D007785), National Library of Medicine, read 2026-09-23. NLM revises MeSH; this copy may not reflect its current record.

CHEBI:36219ChEBI

Open in the graph

What it touches on the way

Mechanistic reach

3 entities

3 entities reached.

0 reported hops3 assembled from the scaffold

What the reference databases state

Statements

5 statements

5 statements · 1 reference database · Subject: alpha-lactose · Sources: Human-GEM

Order

alpha-lactose is a substrate of GLB1ProteinHuman-GEM MAR04415Inferred only
alpha-lactose is a substrate of GLB1LProteinHuman-GEM MAR04415Inferred only
alpha-lactose is a substrate of LCTProteinHuman-GEM MAR04415Inferred only
alpha-lactose is a substrate of LCTProteinHuman-GEM MAR08764Inferred only
alpha-lactose is a substrate of TMPPEProteinHuman-GEM MAR04415Inferred only

Reactions

10 reactions

alpha-lactosealpha-lactose
Reaction pageLeft to rightBalancedEC 1.14.13.9Golgi apparatus, extracellular space
Human-GEM MAR01476CC BY 4.0Reference data
water+alpha-lactosealpha-D-galactose+D-glucose
Catalysed by LCT & GLB1 & GLB1L & TMPPE
Reaction pageLeft to rightBalancedEC 3.2.1.23, 3.2.1.108extracellular space
Human-GEM MAR04415CC BY 4.0Reference data
alpha-lactose+NAD(+)MAM00812e+proton+NADH(2-)
Reaction pageReversibleBalancedEC 1.1.99.13extracellular space
Human-GEM MAR04831CC BY 4.0Reference data
D-glucose+CHEBI:67119proton+alpha-lactose+UDP
Catalysed by B4GALT1 or B4GALT2 or LALBA
Reaction pageLeft to rightBalancedEC 2.4.1.22Golgi apparatus
Human-GEM MAR07674CC BY 4.0Reference data
alpha-lactosealpha-lactose
Reaction pageReversibleBalancedcytosol, lysosome
Human-GEM MAR08763CC BY 4.0Reference data
water+alpha-lactosealpha-D-galactose+D-glucose
Catalysed by LCT
Reaction pageLeft to rightBalancedEC 3.2.1.108lysosome
Human-GEM MAR08764CC BY 4.0Reference data
alpha-lactosealpha-lactose
Reaction pageLeft to rightBalancedGolgi apparatus, cytosol
Human-GEM MAR08913CC BY 4.0Reference data
alpha-lactose
Reaction pageReversibleBalance undeterminableextracellular space
Human-GEM MAR09102CC BY 4.0Reference data
water+MAM02333ealpha-lactose+phosphate(3-)
Catalysed by LCT & GLB1 & GLB1L & TMPPE
Reaction pageLeft to rightBalancedEC 3.2.1.23extracellular space
Human-GEM MAR09556CC BY 4.0Reference data
alpha-lactoseCHEBI:6359
Reaction pageDirection not assertedBalanced
Rhea RHEA:84479CC BY 4.0Reference data

Other names

10 names

Resolves to: alpha-lactose

Also called: 1-beta-D-Galactopyranosyl-4-alpha-D-glucopyranose4-O-beta-D-galactopyranosyl-alpha-D-glucopyranose4-O-β-D-galactopyranosyl-α-D-glucopyranoseAnhydrous lactosebeta-D-Galp-(1->4)-alpha-D-GlcpLactoseMilk sugarβ-D-Galp-(1→4)-α-D-Glcp
Systematic name: beta-D-galactopyranosyl-(1->4)-alpha-D-glucopyranoseβ-D-galactopyranosyl-(1→4)-α-D-glucopyranose