>1s71A (A:) observed residues (from ATOM records)
atgpgivvidkpagmtshdvvgrcrrifatrrvghagtldpmatgvlvigieratkilgl
ltaapksyaatirlgqttstedaegqvlqsvpakhltieaidaamerlrgeilearpiri
drfellaarrrdqlididveidcssgtyiralardlgdalgvgghvtalrrtrvgrfeld
qarslddlaerpalslsldeacllmfarrdltaaeasaaangrslpavgidgvyaacdad
grviallrdegsrtrsvavlrp