Fig. 1
From: Potential role of orexin A binding the receptor 1 for orexins in normal and cryptorchid dogs
OxA- and OX1R-IR in cytotypes of N testes of dogs. a, b: a cluster of Leydig cells containing different quantities of positive granules for both the peptides scattered in their cytoplasm in the N group of canine testis. c, d: OX1R-IR, as a single, intensely stained, granular structure roundish in shape, is contained in the perinuclear cytoplasm of some pachytene (c) and secondary (d) spermatocytes. e, f: round (e) and elongated (f) spermatids intensely stained by the anti-OX1R antibody. Avidin–biotin immunohistochemical technique. Bars: 20 μm