Elicitins are a family of structurally related proteins that induce hy
persensitive response in specific plant species. Two Phytophthora infe
stans cDNAs, inf2A and inf2B, potentially encoding novel elicitin-like
proteins, were isolated from a cDNA library made from infected potato
tissue. Multiple sequence alignments and phylogenetic analyses of 19
elicitins and elicitin-like proteins from nine Phytophthora spp. and f
rom Pythium vexans suggest that there are at least five distinct class
es within the elicitin family.