>6b1yB (B:) observed residues (from ATOM records)
ltnlvaepfakleqdfggsigvyamdtgsgatvsyraeerfplcssfkgflaaavlarsq
qqaglldtpirygknalvpwspisekylttgmtvaelsaaavqysdnaaanlllkelggp
agltafmrsigdttfrldrwelelnsaipgdardtsspravteslqkltlgsalaapqrq
qfvdwlkgnttgnhriraavpadwavgdktgtcgvygtandyavvwptgrapivlavytr
apnkddkhseaviaaaarlaleglg