>5tw0B (B:) SEQRES residues
mkvlflsadgfedlelicplhrikeeghevyvasfergkitgkhgysvnvdlafeevgpd
efdalvlpggrapeivrlnekaieitrkmfeagkpvasichgpqilisagvlkgrkgtst
itirddvvnagaewvneevvvdgnwvssrhpgdlyawmrefvkllk