InterPro domain: IPR010264

This family consists of a series of plant proteins which are related to the Papaver rhoeas S1 self-incompatibility protein. Self-incompatibility (SI) is the single most important outbreeding device found in angiosperms and is a mechanism that regulates the acceptance or rejection of pollen. S1 is known to exhibit specific pollen-inhibitory properties [ 1 ].

1. Cloning and expression of a distinctive class of self-incompatibility (S) gene from Papaver rhoeas L. Proc. Natl. Acad. Sci. U.S.A. 91, 2265-9