>1at3B (B:) observed residues (from ATOM records)
ravpiyvagflalydsgdpgelaldpdtvraalppenplpinvdhrarcevgrvlavvnd
prgpffvgliacvqlervletaasaailsreerllylitnylpsvslstkpdrtlfahva
lcaigrrlgtivtydtsldaaiapfrhldpatregvrreaaeaelalagrtwapgvealt
htllstavnnmmlrdrwslvaerrrqagiaghtylqa