>1v19B (B:) observed residues (from ATOM records)
mlevvtageplvalvpqepghlrgkrllevyvggaevnvavalarlgvkvgfvgrvgede
lgamveerlraegvdlthfrrapgftglylreylplgqgrvfyyrkgsagsalapgafdp
dylegvrflhlsgitpalspearafslwameeakrrgvrvsldvnyrqtlwspeeargfl
eralpgvdllflseeeaellfgrveealralsapevvlkrgakgawafvdgrrvegsafa
veavdpvgagdafaagylagavwglpveerlrlanllgasvaasrgdhegapyredlevl
lk