_EC 3.6.1.- In phosphorus-containing anhydrides. 4,117 PDB entries  
EC 3.-.-.- Hydrolases. [51,972 PDB entries]
EC 3.6.-.- Acting on acid anhydrides. [9,130 PDB entries]
EC 3.6.1.- In phosphorus-containing anhydrides. [4,117 PDB entries]
EC 3.6.1.1 inorganic diphosphatase. [137 PDB entries]
EC 3.6.1.2 trimetaphosphatase. [-]
EC 3.6.1.3 Deleted entry. [9 PDB entries]
EC 3.6.1.4 Transferred entry: 3.6.1.3. [-]
EC 3.6.1.5 apyrase. [23 PDB entries]
EC 3.6.1.6 nucleoside diphosphate phosphatase. [10 PDB entries]
EC 3.6.1.7 acylphosphatase. [45 PDB entries]
EC 3.6.1.8 Atp diphosphatase. [3 PDB entries]
EC 3.6.1.9 nucleotide diphosphatase. [52 PDB entries]
EC 3.6.1.10 endopolyphosphatase. [36 PDB entries]
EC 3.6.1.11 exopolyphosphatase. [24 PDB entries]
EC 3.6.1.12 dCTP diphosphatase. [11 PDB entries]
EC 3.6.1.13 ADP-ribose diphosphatase. [126 PDB entries]
EC 3.6.1.14 adenosine-tetraphosphatase. [1 PDB entries]
EC 3.6.1.15 nucleoside-triphosphate phosphatase. [2,375 PDB entries]
EC 3.6.1.16 CDP-glycerol diphosphatase. [1 PDB entries]
EC 3.6.1.17 bis(5'-nucleosyl)-tetraphosphatase (asymmetrical). [10 PDB entries]
EC 3.6.1.18 Fad diphosphatase. [-]
EC 3.6.1.19 Transferred entry: 3.6.1.9. [9 PDB entries]
EC 3.6.1.20 5'-acylphosphoadenosine hydrolase. [-]
EC 3.6.1.21 ADP-sugar diphosphatase. [-]
EC 3.6.1.22 NAD(+) diphosphatase. [19 PDB entries]
EC 3.6.1.23 dUTP diphosphatase. [203 PDB entries]
EC 3.6.1.24 nucleoside phosphoacylhydrolase. [-]
EC 3.6.1.25 triphosphatase. [9 PDB entries]
EC 3.6.1.26 CDP-diacylglycerol diphosphatase. [1 PDB entries]
EC 3.6.1.27 undecaprenyl-diphosphate phosphatase. [7 PDB entries]
EC 3.6.1.28 thiamine-triphosphatase. [5 PDB entries]
EC 3.6.1.29 bis(5'-adenosyl)-triphosphatase. [13 PDB entries]
EC 3.6.1.30 Transferred entry: 3.6.1.59 and 3.6.1.62. [1 PDB entries]
EC 3.6.1.31 phosphoribosyl-ATP diphosphatase. [9 PDB entries]
EC 3.6.1.32 Transferred entry: 5.6.1.8. [11 PDB entries]
EC 3.6.1.33 Transferred entry: 5.6.1.2. [-]
EC 3.6.1.34 Transferred entry: 7.1.2.2. [33 PDB entries]
EC 3.6.1.35 Transferred entry: 7.1.2.1. [-]
EC 3.6.1.36 Transferred entry: 7.2.2.19. [-]
EC 3.6.1.37 Transferred entry: 7.2.2.13. [-]
EC 3.6.1.38 Transferred entry: 3.6.3.8. [-]
EC 3.6.1.39 thymidine-triphosphatase. [-]
EC 3.6.1.40 guanosine-5'-triphosphate,3'-diphosphate diphosphatase. [3 PDB entries]
EC 3.6.1.41 bis(5'-nucleosyl)-tetraphosphatase (symmetrical). [30 PDB entries]
EC 3.6.1.42 guanosine-diphosphatase. [1 PDB entries]
EC 3.6.1.43 dolichyldiphosphatase. [-]
EC 3.6.1.44 oligosaccharide-diphosphodolichol diphosphatase. [-]
EC 3.6.1.45 UDP-sugar diphosphatase. [44 PDB entries]
EC 3.6.1.46 Transferred entry: 3.6.5.1. [-]
EC 3.6.1.47 Transferred entry: 3.6.5.2. [-]
EC 3.6.1.48 Transferred entry: 3.6.5.3. [1 PDB entries]
EC 3.6.1.49 Transferred entry: 3.6.5.4. [-]
EC 3.6.1.50 Transferred entry: 3.6.5.5. [-]
EC 3.6.1.51 Transferred entry: 3.6.5.6. [-]
EC 3.6.1.52 diphosphoinositol-polyphosphate diphosphatase. [57 PDB entries]
EC 3.6.1.53 Mn(2+)-dependent ADP-ribose/CDP-alcohol diphosphatase. [1 PDB entries]
EC 3.6.1.54 UDP-2,3-diacylglucosamine diphosphatase. [20 PDB entries]
EC 3.6.1.55 8-oxo-dGTP diphosphatase. [51 PDB entries]
EC 3.6.1.56 2-hydroxy-dATP diphosphatase. [121 PDB entries]
EC 3.6.1.57 UDP-2,4-diacetamido-2,4,6-trideoxy-beta-L-altropyranose hydrolase. [2 PDB entries]
EC 3.6.1.58 8-oxo-dGDP phosphatase. [83 PDB entries]
EC 3.6.1.59 5'-(N(7)-methyl 5'-triphosphoguanosine)-[mRNA] diphosphatase. [37 PDB entries]
EC 3.6.1.60 diadenosine hexaphosphate hydrolase (AMP-forming). [14 PDB entries]
EC 3.6.1.61 diadenosine hexaphosphate hydrolase (ATP-forming). [51 PDB entries]
EC 3.6.1.62 5'-(N(7)-methylguanosine 5'-triphospho)-[mRNA] hydrolase. [84 PDB entries]
EC 3.6.1.63 alpha-D-ribose 1-methylphosphonate 5-triphosphate diphosphatase. [-]
EC 3.6.1.64 inosine diphosphate phosphatase. [17 PDB entries]
EC 3.6.1.65 (d)CTP diphosphatase. [1 PDB entries]
EC 3.6.1.66 XTP/dITP diphosphatase. [21 PDB entries]
EC 3.6.1.67 dihydroneopterin triphosphate diphosphatase. [11 PDB entries]
EC 3.6.1.68 geranyl diphosphate phosphohydrolase. [2 PDB entries]
EC 3.6.1.69 8-oxo-(d)GTP phosphatase. [22 PDB entries]
EC 3.6.1.70 guanosine-5'-diphospho-5'-[DNA] diphosphatase. [-]
EC 3.6.1.71 adenosine-5'-diphospho-5'-[DNA] diphosphatase. [17 PDB entries]
EC 3.6.1.72 DNA-3'-diphospho-5'-guanosine diphosphatase. [17 PDB entries]
EC 3.6.1.73 inosine/xanthosine triphosphatase. [4 PDB entries]
EC 3.6.1.74 mRNA 5'-phosphatase. [180 PDB entries]
EC 3.6.1.75 diacylglycerol diphosphate phosphatase. [2 PDB entries]
EC 3.6.1.76 prenyl-diphosphate phosphatase. [-]
EC 3.6.1.77 coenzyme A diphosphatase. [40 PDB entries]
EC 3.6.1.n1 Transferred entry: 3.1.1.96. [-]
EC 3.6.1.n2 L-cysteinyl-tRNA(Pro). [-]
EC 3.6.1.n3 L-cysteinyl-tRNA(Cys) hydrolase. [-]
EC 3.6.1.n4 Transferred entry: 3.6.1.67. [-]
EC 3.6.1.n5 Transferred entry: 3.6.1.54. [-]

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