>1i51A (A:) observed residues (from ATOM records)
yqynmnfeklgkciiinnknfdkvtgmgvrngtdkdaealfkcfrslgfdvivyndcsca
kmqdllkkaseedhtnaacfacillshgeenviygkdgvtpikdltahfrgarcktllek
pklffiqacrgtelddgiq