1.14.16.4 tryptophan 5-monooxygenase GH4-C1 cell pituitary cell line 688507 3.1.22.1 deoxyribonuclease II GH4-C1 cell somato-lactotrope cell 677615 3.1.3.16 protein-serine/threonine phosphatase GH4-C1 cell pituitary cell line 666754 3.4.21.B26 proprotein convertase 5 GH4-C1 cell - 673910 3.4.24.61 nardilysin GH4-C1 cell - 668421 4.6.1.1 adenylate cyclase GH4-C1 cell AC4 and AC6 679659