4.1.1.71 hanging drop vapor diffusion method, using 39-46.5% (w/v) 2-methyl-2,4-pentanediol, 100 mM HEPES (pH 7.0), 200 mM NaCl 4.1.1.71 hanging drop vapor diffusion method, using 52-59% (w/v) 2-methyl-2,4-pentanediol and 22-25 mM sodium acetate