In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 4 ) Mutation of the three extracellular cysteine residues of GFKAR beta indicated that the two conserved cysteine residues ( C305 and C385 ) , located between two transmembrane segments , form a solvent - accessible disulfide bond .
GFKAR beta

 These include not only antioxidants , N - methyl - D - aspartate receptor antagonists , inhibitors of glutamate release , calcium channel blockers , polyamine antagonists , and nitric oxide synthase inhibitors , but cannabinoids , aspirin , melatonin , and vitamin B - 12 .
nitric oxide synthase

 Serum alpha - amylase , trypsin , trypsin inhibitor , lipase and total protease activity in the pancreatic tissue was studied as indicator of the treatment efficacy with 5 - fluorouracil electro - cumulation .

trypsin inhibitor