>2a21A (A:) observed residues (from ATOM records) ekflviagpcaieseelllkvgeeikrlsekfkevefvfkssfdkanrssihsfrghgle ygvkalrkvkeefglkittdiheswqaepvaevadiiqipaflcrqtdlllaaaktgrav nvkkgqflapwdtknvveklkfggakeiyltergttfgynnlvvdfrslpimkqwakviy dathsvqlpgglgdksggmrefifpliraavavgcdgvfmethpepekalsdastqlpls qlegiieaileirevaskyyeti