>4utcB (B:) observed residues (from ATOM records)
mrcigisnrdfvegwvdivlehgscvttmaknkptldfelikteakqpatlrkycieakl
tntttesrcptqgepslneeqdkrfickhsmvdrgwgngcglfgkggivtcakftckknm
egkivqpenleytivitphsgeehavgndtgkhgkeikitpqsstteaeltgygtvtmec
sprtgldfnemvllqmedkawlvhrqwfldlplpwlpgadtqgsnwiqketlvtfknpha
kkqdvvvlgsqegamhtaltgateiqmssgnllftghlkcrlrmdklqlkgmsysmctgk
fkivkeiaetqhgtivirvqyegdgspckipfeitdlekrhvlgrlitvnpivtekdspv
nieaeppfgdsyiivgvepgqlklnwlrpl