| histidine ammonia-lyase | <enzyme> An enzyme of the lyase class that catalyses the reaction of l-histidine to form urocanate and ammonia. The reaction is the initial step of histidine catabolism. Genetic deficiency of the enzyme, transmitted as an autosomal recessive trait, causes histidinaemia. Chemical name: L-Histidine ammonia-lyase Registry number: EC 4.3.1.3 (12 Dec 1998) |
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| diaminopropionate ammonia-lyase | <enzyme> Used for the determination of diaminopropionic acid Registry number: EC 4.3.1.- (26 Jun 1999) |
| ethanolamine ammonia-lyase | <enzyme> An enzyme that catalyses the deamination of ethanolamine to acetaldehyde. Chemical name: Ethanolamine ammonia-lyase Registry number: EC 4.3.1.7 (12 Dec 1998) |
| L-tyrosine ammonia-lyase | <enzyme> Catalyses the conversion of tyrosine to trans-p-coumaric acid and ammonia Registry number: EC 4.3.1.- Synonym: tyrosine ammonia-lyase (26 Jun 1999) |