_EC 4.3.1.- Ammonia-lyases. 178 PDB entries  
EC 4.-.-.- Lyases. [10,244 PDB entries]
EC 4.3.-.- Carbon-nitrogen lyases. [543 PDB entries]
EC 4.3.1.- Ammonia-lyases. [178 PDB entries]
EC 4.3.1.1 aspartate ammonia-lyase. [10 PDB entries]
EC 4.3.1.2 methylaspartate ammonia-lyase. [6 PDB entries]
EC 4.3.1.3 histidine ammonia-lyase. [9 PDB entries]
EC 4.3.1.4 formimidoyltetrahydrofolate cyclodeaminase. [4 PDB entries]
EC 4.3.1.5 Transferred entry: 4.3.1.23, 4.3.1.24 and 4.3.1.25. [-]
EC 4.3.1.6 beta-alanyl-CoA ammonia-lyase. [-]
EC 4.3.1.7 ethanolamine ammonia-lyase. [10 PDB entries]
EC 4.3.1.8 Transferred entry: 2.5.1.61. [-]
EC 4.3.1.9 glucosaminate ammonia-lyase. [-]
EC 4.3.1.10 serine-sulfate ammonia-lyase. [-]
EC 4.3.1.11 Deleted entry. [-]
EC 4.3.1.12 ornithine cyclodeaminase. [19 PDB entries]
EC 4.3.1.13 carbamoyl-serine ammonia-lyase. [-]
EC 4.3.1.14 3-aminobutyryl-CoA ammonia-lyase. [-]
EC 4.3.1.15 diaminopropionate ammonia-lyase. [6 PDB entries]
EC 4.3.1.16 threo-3-hydroxy-L-aspartate ammonia-lyase. [-]
EC 4.3.1.17 L-serine ammonia-lyase. [25 PDB entries]
EC 4.3.1.18 D-serine ammonia-lyase. [24 PDB entries]
EC 4.3.1.19 threonine ammonia-lyase. [18 PDB entries]
EC 4.3.1.20 erythro-3-hydroxy-L-aspartate ammonia-lyase. [-]
EC 4.3.1.21 Transferred entry: 4.3.1.9. [-]
EC 4.3.1.22 3,4-dihydroxyphenylalanine reductive deaminase. [-]
EC 4.3.1.23 tyrosine ammonia-lyase. [12 PDB entries]
EC 4.3.1.24 phenylalanine ammonia-lyase. [21 PDB entries]
EC 4.3.1.25 phenylalanine/tyrosine ammonia-lyase. [3 PDB entries]
EC 4.3.1.26 Transferred entry: 1.21.98.2. [-]
EC 4.3.1.27 threo-3-hydroxy-D-aspartate ammonia-lyase. [8 PDB entries]
EC 4.3.1.28 L-lysine cyclodeaminase. [-]
EC 4.3.1.29 D-glucosaminate-6-phosphate ammonia lyase. [1 PDB entries]
EC 4.3.1.30 dTDP-4-amino-4,6-dideoxy-D-glucose ammonia-lyase. [2 PDB entries]
EC 4.3.1.31 L-tryptophan ammonia lyase. [-]
EC 4.3.1.32 7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase. [-]
EC 4.3.1.33 (R)-1-hydroxy-2-aminoethylphosphonate ammonia-lyase. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass