>3tr4B (B:) observed residues (from ATOM records)
lvsagkgiddfnviieipanggevkyeydkelgfltvdrfmptsmrypcnygfvpstlaq
dgdpldvlvltpvpvqpgvlmrvralgimkmedeagedskvlavpvvkacrayeaiqslk
dissllldaishfferykdlepnkwakvkgwedkeaakkefeasivrfkek