>4i13B (B:) observed residues (from ATOM records)
qvqlqesggglvqagaslrlscaaserltvdyaigwfrqapgkerefvaaiswgggltvy
gesvegrftisrdiakntmnlqmnvlrpedtanyycaasrisyrvwntipynkltlwgrg
tqvtvssh