Expression and Localization of Opioid Receptors in Male Germ Cells (IMAGE)
Caption
Presence of the mu-opioid receptor (A) of the delta-opioid receptor (B) and of the kappa-opioid receptor (C) in spermatogonia, spermatocytes and spermatids corresponding to positive cells for ITGA6, SYCP1 and SYCP3, and ACR, respectively.
Credit
N. Subiran (UPV/EHU)
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