>3iw4A (A:) observed residues (from ATOM records)
ldrvkltdfnflmvlgkgsfgkvmladrkgteelyaikilkkdvviqdddvectmvekrv
lalldkppfltqlhscfqtvdrlyfvmeyvnggdlmyhiqqvgkfkepqavfyaaeisig
lfflhkrgiiyrdlkldnvmldseghikiadfgmckehmmdgvttrefcgtpdyiapeii
ayqpygksvdwwaygvllyemlagqppfdgededelfqsimehnvsypkslskeavsick
glmtkhpakrlgcgpegerdvrehaffrridweklenreiqppfkpkvfdkfftrgqpvl
tppdqlvianidqsdfegfsyvnpqfvhpilq