Seminal fluid protein
Seminal fluid proteins (SFPs), or accessory gland proteins (Acps), are one of the non-sperm components of semen. In many animals with internal fertilization, males transfer a complex cocktail of proteins in their semen to females during copulation. These seminal fluid proteins often have diverse, potent effects on female post-mating phenotypes. SFPs are produced by the male accessory glands.
Seminal fluid proteins frequently show evidence of elevated evolutionary rates and are often cited as an example of sexual conflict.