>4ysxF (F:) observed residues (from ATOM records)
tgkriktfeiyrfnpeepgakpklqkfdvdldkcgtmvldalikiknevdptltfrrscr
egicgscamniagentlacicnidqntskttkiyplphmfvikdlvpdmnlfyaqyasiq
pwlqkktkinlgekqqyqsikeqekldglyecilcaccsascpsywwnadkylgpavlmq
ayrwiidsrddsaaerlarmqdgfsafkchtimnctktcpkhlnparaigeikmlltkmk
tkpaplptpanf