>3tr4D (D:) observed residues (from ATOM records)
vsagkgiddfnviieipanggevkyeydkelgfltvdrfmptsmrypcnygfvpstlaqd
gdpldvlvltpvpvqpgvlmrvralgimkmedeagedskvlavpvvkacrayeaiqslkd
issllldaishfferykdlepnkwakvkgwedkeaakkefeasivrfk