>1xp2B (B:) observed residues (from ATOM records)
amalteawliekanrklnaggmykitsdktrnvikkmakegiylcvaqgyrstaeqnaly
aqgrtkpgaivtnakggqsnhnygvavdlclytndgkdviwesttsrwkkvvaamkaegf
kwggdwksfkdyphfelcdavsgekipaa