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FL-CrgA crystals before and after optimization by streak-seeding. (a) Initial crystals of crystal form A grown in 10%(v/v) 2-methyl-2,4-pentanediol, 0.1 M sodium acetate pH 5 and (b) crystal form A after optimization by streak-seeding. (c) Initial crystals of crystal form B grown in 0.5 M ammonium sulfate, 1 M lithium sulfate, 0.1 M trisodium citrate pH 5.6 and (d) crystal form B after optimization by streak-seeding.
