Gene name - sex peptide receptor. Synonyms - CG Cytological map position - 4FA1. Function - transmembrane protein. Keywords - required in brain for post-mating switch in female reproductive behavior. The world's first wiki where authorship really matters. Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. PT (Bremelanotide) 10mg. PT is a research peptide that carries a half-life of minutes. It has a molecular formula of C 50 H 68 N .