>3tl1B (B:) observed residues (from ATOM records) maghtdneitiaapmelvwnmtndiekwpglfseyasvevlgrdddkvtfrltmhpdadg kvwswvservadpvtrtvraqrvetgpfqymnivweyaetaegtvmrwtqdfamkpdapv ddawmtdninrnsrtqmalirdrieqaagerrtasvla