_EC 4.6.1.- Phosphorus-oxygen lyases. 904 PDB entries  
EC 4.-.-.- Lyases. [10,244 PDB entries]
EC 4.6.-.- Phosphorus-oxygen lyases. [904 PDB entries]
EC 4.6.1.- Phosphorus-oxygen lyases. [904 PDB entries]
EC 4.6.1.1 adenylate cyclase. [140 PDB entries]
EC 4.6.1.2 guanylate cyclase. [51 PDB entries]
EC 4.6.1.3 Transferred entry: 4.2.3.4. [-]
EC 4.6.1.4 Transferred entry: 4.2.3.5. [-]
EC 4.6.1.5 Transferred entry: 4.2.3.7. [-]
EC 4.6.1.6 cytidylate cyclase. [2 PDB entries]
EC 4.6.1.7 Transferred entry: 4.2.3.8. [-]
EC 4.6.1.8 Transferred entry: 4.2.3.10. [-]
EC 4.6.1.9 Transferred entry: 4.2.3.11. [-]
EC 4.6.1.10 Transferred entry: 4.2.3.12. [-]
EC 4.6.1.11 Transferred entry: 4.2.3.13. [-]
EC 4.6.1.12 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase. [73 PDB entries]
EC 4.6.1.13 phosphatidylinositol diacylglycerol-lyase. [30 PDB entries]
EC 4.6.1.14 glycosylphosphatidylinositol diacylglycerol-lyase. [-]
EC 4.6.1.15 FAD-AMP lyase (cyclizing). [-]
EC 4.6.1.16 tRNA-intron lyase. [19 PDB entries]
EC 4.6.1.17 cyclic pyranopterin monophosphate synthase. [13 PDB entries]
EC 4.6.1.18 pancreatic ribonuclease. [387 PDB entries]
EC 4.6.1.19 ribonuclease T2. [38 PDB entries]
EC 4.6.1.20 ribonuclease U2. [5 PDB entries]
EC 4.6.1.21 Enterobacter ribonuclease. [4 PDB entries]
EC 4.6.1.22 Bacillus subtilis ribonuclease. [28 PDB entries]
EC 4.6.1.23 ribotoxin. [2 PDB entries]
EC 4.6.1.24 ribonuclease T1. [109 PDB entries]
EC 4.6.1.25 bacteriophage T4 restriction endoribonuclease RegB. [-]
EC 4.6.1.26 uridylate cyclase. [3 PDB entries]

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