>4rku1 (1:) observed residues (from ATOM records)
prpsyldgsapgdfgfdplrlgevpenlerfkeselihcrwamlavpgilvpealglgnw
vkaqewaalvpwgtlptilvieflsiafvehqrsmekdpekkkypggafdplgyskdpkk
fheykikevkngrlallafvgicvqqsaypgtgplenlathladpwhnnig