>2tn4A (A:) SEQRES residues
tdqqaearsylseemiaefkaafdmfdadgggdisvkelgtvmrmlgqtptkeeldaiie
evdedgsgtidfeeflvmmvrqmkedakgkseeelaelfrifdrnadgyidaeelaeifr
asgehvtdeeieslmkdgdknndgridfdeflkmmegvq