Insulin: Lysates

Insulin and the IGFs are members of the insulin family of molecules. IGF-I and II are structurally homologous to proinsulin, and can be thought of as taking the shape of an exaggerated, inverted letter G. Intrachain disulfide bonds link sections of the G. Insulin processes out part of the G, leaving two parallel, but disulfide linked segments; the IGFs only process at the ends, retaining the basic configuration.