>4tncA (A:) observed residues (from ATOM records)
amdqqaearaflseemiaefkaafdmfdadgggdistkelgtvmrmlgqnptkeeldaii
eevdedgsgtidfeeflvmmvrqmkedakgkseeeladcfrifdknadgfidieelgeil
ratgehvteediedlmkdsdknndgridfdeflkmmegvq