Immunohistochemical localization of leptin receptor in different tissues of Chinese alligator: A, adipocyte; B, submucosa (SUI) and muscular layer (ML) of the intestine; C, intestine villi (IV) of the intestine; D, granulosa cell (G) and follicular membrane cell (FM) of the ovary; E, submucosa (SUS) of the stomach; F, gastric gland (GG) of the stomach; G, interstitial cell (IC), seminiferous tubule (ST) of the testis. Magnification: A, C, E = X400; B, D, F, G = X200.