Fasciculin 1 from Dendroaspis angusticeps has been crystallized by vapour diffusion, in sodium acetate using sodium thiocyanate as precipitant. Tetragonal crystals (space group P4(1)2(1)2 or P4(3)2(1)2) diffract to 1.8 A resolution. The unit cell parameters are a = 40.4 A and c = 81.1 A. We estimated the presence of one molecule in the asymmetric unit.
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