>4tw1D (D:) observed residues (from ATOM records)
tapddigkngkitkrtetvydektnilqnlqfdfiddptydknvllvkkqgsihsnlkfe
shkeeknsnwlkypseyhvdfqvkrnrkteildqlpknkistakvdstfsyssggkfdst
kgigrtssnsysktisynqqnydtiasgknnnwhvhwsviandlkyggevknrndellfy
rntriatvenpelsfaskyrypalvrsgfnpefltylsneksnektqfevtytrnqdilk
nrpgihyappileknkdgqrlivtyevdwknktvkvvdkysddnkpyke