>7ch5R (R:) observed residues (from ATOM records)
nlcpfgevfnatrfasvyawnrkrisncvadysvlynsasfstfkcygvsptklndlcft
nvyadsfvirgdevrqiapgqtgkiadynyklpddftgcviawnsnnldskvggnynyly
rlfrksnlkpferdisteiyqagstpcngvegfncyfplqsygfqptngvgyqpyrvvvl
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