In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Resistance to this chemical is highly correlated with polycystic ovary syndrome. A modification of this compound that has undergone a glycine-asparagine substitution and had two arganines added to its B chain is commercially important because it readily hexamerizes and this chemical is stored as an inactive hexamer. This signal molecule is activated by removal of its (*) C peptide component to promote the dephosphorylation of acetyl-CoA carboxylase. When this enzyme binds to its tyrosine kinase receptor, GLUT's are activated to facilitate trans-membrane import of a substance whose export is facilitated by this hormone's agonist, glucagon. For 10 points, name this hormone extracted by Frederick Banting that regulates blood sugar levels.
Science