Protein Data Bank ID: 3B4V
Protein Name: Activin A
Organism: Homo sapiens
Title of Drawing: “The Butterfly”
Activin A is a dimeric protein complex which enhances the liberation of the follicle-stimulating hormone (FSH) from the pituitary gland. Therefore activin indirectly controls the development and reproductive processes of the male as well as of the female body.
The protein data bank entry comprises four activin beta-A chains in complex with four follistatin-like 3 (FSTL3) proteins. The “Butterfly” consists of an activin beta-A dimer (Activin A protein).