1. 1.14.15.7 enzyme   choline monooxygenase
                      choline,reduced-ferredoxin:oxygen oxidoreductase

2. 1.1.3.17 enzyme   choline oxidase
                      choline:oxygen 1-oxidoreductase

3. 1.1.99.1 enzyme   choline dehydrogenase
                      choline oxidase
                      choline:(acceptor) oxidoreductase
                      choline-cytochrome c reductase
                      choline:(acceptor) 1-oxidoreductase

4. 2.3.1.6 enzyme   choline acetylase
                      choline acetyltransferase
                      choline O-acetyltransferase
                      acetyl-CoA:choline O-acetyltransferase

5. 2.7.1.32 enzyme   choline kinase
                      choline phosphokinase
                      ATP:choline phosphotransferase
                      choline kinase (phosphorylating)
                      choline-ethanolamine kinase

6. 2.8.2.6 enzyme   choline sulfotransferase
                      choline sulphokinase
                      3'-phosphoadenylyl-sulfate:choline sulfotransferase

7. 3.1.1.7 enzyme   acetylcholinesterase
                      acetylthiocholinesterase
                      cholinesterase
                      acetylcholine acetylhydrolase
                      acetylcholine hydrolase
                      true cholinesterase
                      acetyl.beta-methylcholinesterase
                      choline esterase I
                      AcCholE

8. 3.1.1.8 enzyme   anticholineesterase
                      benzoylcholinesterase
                      butyrylcholinesterase
                      cholinesterase
                      propionylcholinesterase
                      pseudocholinesterase
                      acylcholine acylhydrolase
                      butyrylcholine esterase
                      choline esterase
                      non-specific cholinesterase
                      choline esterase II (unspecific)
                      BtChoEase

9. 3.1.4.4 enzyme   choline phosphatase
                      phosphatidylcholine phosphatidohydrolase
                      lecithinase D
                      lipophosphodiesterase II
                      phospholipase D

10. 3.1.6.6 enzyme   choline-sulfatase
                      choline-sulfate sulfohydrolase

11. 2.3.1.91 enzyme   sinapoylglucose-choline O-sinapoyltransferase
                      1-O-(4-hydroxy-3,5-dimethoxycinnamoyl)-beta-D-glucose:choline 1-O-(4-hydroxy-3,5-dimethoxycinnamoyl)transferase
                      sinapine synthase

12. 2.7.7.15 enzyme   phosphocholine cytidylyltransferase
                      phosphorylcholine cytidylyltransferase
                      phosphorylcholine transferase
                      CDP-choline pyrophosphorylase
                      CDP-choline synthetase
                      CTP-phosphocholine cytidylyltransferase
                      CTP:phosphorylcholine cytidylyltransferase
                      choline phosphate cytidylyltransferase
                      choline-phosphate cytidylyltransferase
                      cytidine diphosphocholine pyrophosphorylase
                      phosphorylcholine:CTP cytidylyltransferase
                      CTP:choline-phosphate cytidylyltransferase

13. 2.7.8.10 enzyme   sphingosine cholinephosphotransferase
                      phosphorylcholine-sphingosine transferase
                      sphingosine choline phosphotransferase
                      CDP-choline-sphingosine cholinephosphotransferase
                      CDP-choline:sphingosine cholinephosphotransferase
                      cytidine diphosphocholine-sphingosine cholinephosphotransferase

14. 2.7.8.2 enzyme   cholinephosphotransferase
                      alkylacylglycerol cholinephosphotransferase
                      diacylglycerol cholinephosphotransferase
                      phosphocholine diacylglyceroltransferase
                      alkylacylglycerol choline phosphotransferase
                      diacylglycerol choline phosphotransferase
                      phosphorylcholine-glyceride transferase
                      CDP-choline diglyceride phosphotransferase
                      cytidine diphosphocholine glyceride transferase
                      cytidine diphosphorylcholine diglyceride transferase
                      1-alkyl-2-acetylglycerol cholinephosphotransferase
                      sn-1,2-diacylglycerol cholinephosphotransferase
                      CDP choline:1,2-diacylglycerol cholinephosphotransferase
                      1-alkyl-2-acetyl-sn-glycerol cholinephosphotransferase
                      1-alkyl-2-acetyl-m-glycerol:CDPcholine choline phosphotransferase
                      CPT

15. 3.1.1.49 enzyme   sinapoylcholine sinapohydrolase
                      aromatic choline esterase
                      sinapine esterase

16. 2.7.8.22 enzyme   1-alkenyl-2-acylglycerol choline phosphotransferase
                      CDP-choline:1-alkenyl-2-acylglycerol cholinephosphotransferase
                      CDP-choline-1-alkenyl-2-acyl-glycerol phosphocholinetransferase

17. 2.7.8.24 enzyme   phosphatidylcholine synthase
                      CDP-diacylglycerol:choline O-phosphatidyltransferase
                      CDP-diglyceride-choline O-phosphatidyltransferase

18. 2.7.8.3 enzyme   ceramide cholinephosphotransferase
                      phosphorylcholine-ceramide transferase
                      CDP-choline:N-acylsphingosine cholinephosphotransferase