>4tw1N (N:) observed residues (from ATOM records)
apddigkngkitkrtetvydektnilqnlqfdfiddptydknvllvkkqgsihsnlkfes
hkeeknsnwlkypseyhvdfqvkrnrkteildqlpknkistakvdstfsyssggkfdstk
gigrtssnsysktisynqqnydtiasgknnnwhvhwsviandlkyggevknrndellfyr
ntriatvenpelsfaskyrypalvrsgfnpefltylsneksnektqfevtytrnqdilkn
rpgihyappileknkdgqrlivtyevdwknktvkvvdkysddnkpyke