>6a7sB (B:) observed residues (from ATOM records)
ccseddcpsgwkffggscylfdegsrgwegskafceskdaslvtvecskeddfirgilsg
qtakhyywigarwneehndyrwidgspftfigwgpgkpdnnkgcldylnykevvwqwndh
vdcentngpciceidcsd