>1xarB (B:) observed residues (from ATOM records)
eltdlktaferlcrhcpkdwtffqgncyfmsnsqrnwhdsvtacqevraqlvviktaeeq
nflqlqtsrsnrfswmglsdlnqegtwqwvdgsplspsfqrywnsgepnnsgnedcaefs
gsgwndnrcdvdnywickkpaacf