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. Author manuscript; available in PMC: 2006 Mar 22.
Published in final edited form as: Acta Crystallogr D Biol Crystallogr. 2006 Feb 22;62(Pt 3):339–346. doi: 10.1107/S0907444906000813

Table 1.

Estimated visual threshold values for the model proteins.

Protein MW (Da) Crystallization conditions Labeled range (%) 0% CR resolution (Å) % CR visual threshold
Thaumatin 22000 0.75 M Na/K tartrate 0.1–10 2.04 0.1–0.25
Lysozyme 14300 5% NaCl, 0.1 M Na acetate pH 4.8 0.025–10 1.55 (both NLYS and RLYS) 0.1–0.25
Ribonuclease 13800 28% ammonium sulfate, 3 M NaCl, 0.1 M Na acetate pH 6.0 0.01–5 1.66 0.05–0.1
Insulin 5800 0.4 M disodium phosphate, 25% glycerol, pH 9.2 0.01–5 1.74 0.025–0.05