>2f20B (B:) observed residues (from ATOM records)
cfhnsmsakaikvaarygrqsdvveiyqsildeqyhvnaftfprypiitssdevqvfnwg
lipfwvrseedateirkmtlnaradtifekpsfrepimkkrcivpstgyfewrheganki
pyyiyvkdepifsmagiydrwldkdtgeehetfsiittdtnsltdyidntkhrmpailtq
eeeekwlnpslskaeiasllkpfdtekmdayvirndflkkspndptivqral