>4pw7B (B:) observed residues (from ATOM records)
ivpsnhygpipgipvgstwrfrvqvseagvhrphvggihgrsndgayslvlaggfadevd
rgdeftytgsgsadqtltnmnralalncdaplddkigaesrnwragkpvrvirsfkgrki
skyapeegnrydgiykvvkywpeissshgflvwryllrrddvepapwtsegiersrrlcl
rlqypagyp