D-ribose

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)

Catalysed by RBKS

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. D-ribose 5-phosphate + CTP + H(+) = CDP-D-ribose + diphosphate

Catalysed by RBKS, CRPPA

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. alpha-D-ribose 1-phosphate = D-ribose 5-phosphate

Catalysed by RBKS, PGM2

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. D-ribose 5-phosphate + ATP + H(+) = ADP-D-ribose + diphosphate

Catalysed by RBKS, NUDT5

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. D-ribose 5-phosphate + ATP = 5-phospho-alpha-D-ribose 1-diphosphate + AMP + H(+)

Catalysed by RBKS, PRPS2, PRPS1L1, PRPS1

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. D-ribose 5-phosphate + ATP = 5-phospho-alpha-D-ribose 1-diphosphate + AMP + H(+)
3. Nicotinate-nucleotide:pyrophosphate phosphoribosyltransferase (carboxylating)

Catalysed by RBKS, PRPS2, PRPS1L1, PRPS1 and 1 morecytosolOne of 2 routes

1. D-ribose + ATP = D-ribose 5-phosphate + ADP + H(+)
2. D-ribose 5-phosphate + ATP = 5-phospho-alpha-D-ribose 1-diphosphate + AMP + H(+)
3. Orotidine-5'-phosphate:diphosphate phospho-alpha-D-ribosyl-transferase