Major pilus subunit. Expressed only in pathogenic serotypes, it is part of myf, a probable virulence factor. MNMKKFVKKPLAIAVLMLASGGMVNMVHAEPTVINSKDISATKTVKEGGSFSVEFKATENEIVSGKLDADTPAFHLVMSDSGEHKGWNVRPTGASEGGQMVSADGTRVDLHTNELSWDNDHWWIDDGSERVEATFFLAAGDEVKAGEYQFTGRVEEYVE Myf antigen C-AG MYFA_YEREN 159 myfA Fimbrial protein myfA