>2btrA (A:) observed residues (from ATOM records)
menfqkvekigegtygvvykarnkltgevvalkkitaireisllkelnhpnivklldvih
tenklylvfeflhqdlkkfmdasaltgiplpliksylfqllqglafchshrvlhrdlkpq
nllintegaikladfglaevvtlwyrapeillgckyystavdiwslgcifaemvtrralf
pgdseidqlfrifrtlgtpdevvwpgvtsmpdykpsfpkwarqdfskvvppldedgrsll
sqmlhydpnkrisakaalahpffqdvtkpvphlrl