Met 12, a 12-amino acid peptide containing the YLGA motif in the N-terminal region of the extracellular domain of the α chain of Met, a tyrosine kinase receptor for hepatocyte growth receptor, is a small molecular weight inhibitor of Fas [23, 24] and acts as an inhibitor of the apoptosis-activating Fas/FasL pathway in a transformed photoreceptor cell line (661 W cells) and in an animal model of retinal detachment [23]. This evidence concerns the gene FAS and retinal detachment.