G Protein-coupled receptors

 Ion channels

 Nuclear receptors

 Protein kinases

 Cytokines and receptors

 Cell surface molecules and ligands

 Transporters

 Enzymes

   Oxidoreductases (EC1)

   Transferases (EC2)

   Hydrolases (EC3)

     Carboxylic-ester hydrolases [EC:3.1.1.-]

     Phosphatases [EC:3.1.3.-]

     Phosphodiesterases [EC:3.1.4.-]

     Sulfatases [EC:3.1.6.-]

     Glycosidases [EC:3.2.1.-]

       AMY [HSA:279 280] [KO:K01176]

       GAA [HSA:2548] [KO:K12316]

       GAA* [HSA_VAR:2548v1] [HSA:2548] [KO:K12316]

       GANC [HSA:2595] [KO:K12317]

       MGAM [HSA:8972] [KO:K12047]

       MAN2B1* [HSA_VAR:4125v1] [HSA:4125] [KO:K12311]

       GUSB [HSA:2990] [KO:K01195]

       GUSB* [HSA_VAR:2990v1] [HSA:2990] [KO:K01195]

       GLA* [HSA_VAR:2717v1] [HSA:2717] [KO:K01189]

       GLA* [HSA_VAR:2717v2] [HSA:2717] [KO:K01189]

       GBA* [HSA_VAR:2629v1] [HSA:2629] [KO:K01201]

       SI [HSA:6476] [KO:K01203]

       SI* [HSA_VAR:6476v1] [HSA:6476] [KO:K01203]

       NAGLU* [HSA_VAR:4669v1] [HSA:4669] [KO:K01205]

       IDUA* [HSA_VAR:3425v1] [HSA:3425] [KO:K01217]

       HPSE [HSA:10855] [KO:K07964]

     ADP-ribosyl cyclase [EC:3.2.2.6]

     Aminopeptidases [EC:3.4.11.-]

     Dipeptidases [EC:3.4.13.-]

     Peptidyl-peptidases [EC:3.4.14.-]

     Peptidyl-dipeptidases [EC:3.4.15.-]

     Metallocarboxypeptidases [EC:3.4.17.-]

     Serine peptidases [EC:3.4.21.-]

     Cysteine peptidases [EC:3.4.22.-]

     Aspartic peptidases [EC:3.4.23.-]

     Metallo peptidases [EC:3.4.24.- 3.4.17.-]

     Threonine peptidases [EC:3.4.25.-]

     Glutaminase [EC:3.5.1.2]

     Histone deacetylase [EC:3.5.1.98]

     Arginase [EC:3.5.3.1]

     Adenosine deaminase [EC:3.5.4.4]

     Cytidine deaminase [EC:3.5.4.5]

     ATPase [EC:3.6.3.-]

   Lyases (EC4)

   Isomerases (EC5)

   Ligases (EC6)

 Nucleic acids

 Not elsewhere classified