Together with the alpha chain CGA constitutes follitropin, the follicle-stimulating hormone, and provides its biological specificity to the hormone heterodimer. Binds FSHR, a G protein-coupled receptor, on target cells to activate downstream signaling pathways . Follitropin is involved in follicle development and spermatogenesis in reproductive organs (By similarity).
Subcellular locations: Secreted
Efficient secretion requires dimerization with CGA.