>3r7lB (B:) observed residues (from ATOM records)
mkhlttmselsteeikdllqtaqelksgktdnqltgkfaanlffepstrtrfsfevaekk
lgmnvlnldgtstsvqkgetlydtirtlesigvdvcvirhsedeyyeelvsqvnipilna
gdgcgqhptqslldlmtiyeefntfkgltvsihgdikhsrvarsnaevltrlgarvlfsg
psewqdeentfgtyvsmdeavessdvvmllriqnerhqsavsqegylnkygltveraerm
krhaiimhpapvnrgveiddslveseksrifkqmkngvfirmaviqralq