>2if2A (A:) observed residues (from ATOM records)
mkrigltgnigcgkstvaqmfrelgayvldadklihsfyrkghpvyeevvktfgkgilde
egnidrkkladivfkdeeklrkleeithralykeiekitknlsedtlfileasllvekgt
yknydklivvyapyevckeraikrgmseedferrwkkqmpieekvkyadyvidnsgsiee
tykqvkkvyeeltr