>5xr6B (B:) observed residues (from ATOM records)
hmydylfklvligdsgvgksnllsrftknefnleskstigvefatkttkvegkvvkaqiw
dtagqeraitsayyrgavgalliydvtrhatfenaarwlrelrghtdpnivvmlignkcd
lrhlvavkteeakafaereslyfmetsaldatnvenaftevltqihkivs