The genes encode for resistance against Venturia inaequalis (apple
scab). The gene product consists an extracellular receptor protein
of a leucine-rich repeat (LRR) class with a transmembrane (TM)
region acting as a membrane anchor.
The role of the predicted protein has yet to be demonstrated
however by analogy to the tomato Cf gene it is likely that the
HcrVf2 in an extracellular receptor involved in pathogen