>5t55B (B:) observed residues (from ATOM records)
selsfnypnfqsveditfqggasprnetlqltptdsngipirqraghavysqpfqlrdts
fyttftfvirttsnspadgfaifiappdfpvkryggylglfepntatntsankvvavefd
twvntewkepryrhigidvnsivsvrvtrwqdkdvfsrsiatahvgydgiskiltafvty
pdggnyvlshvvdlaeifpgdvrigfsgatgqyetqyihswsfsststn