>1sl6F (F:) observed residues (from ATOM records)
peksklqeiyqeltqlkaaqiyqeltdlktaferlcrhcpkdwtffqgncyfmsnsqrnw
hdsvtacqevraqlvviktaeeqnflqlqtsrsnrfswmglsdlnqegtwqwvdgsplsp
sfqrywnsgepnnsgnedcaefsgsgwndnrcdvdnywickkpaacfr