>3hchB (B:) observed residues (from ATOM records) ykkpsdaelkrtlteeqyqvtqnsateyafsheydhlfkpgiyvdvvsgeplfssadkyd sgsgwpsftrpidaksvtehddfsrrtevrshaadshlghvfpdgprdkgglrysingas lkfipleqmdaagygalkskvk