Periodicity in lysozyme crystallization in the presence of malonate. (a) A gelled lysozyme capillary (50 mg ml−1, 3.5 mM) equilibrated against a reservoir of 3.4 M sodium malonate pH 7.0. Pictures are taken after a couple of weeks of diffusion. (b) The crystallization periodicity of lysozyme is not linear but follows a geometric series as predicted by Liesegang. (c) Determination of the spacing coefficient of lysozyme (P = 2.56). (c) Lysozyme does not obey the width law. (d) As for TollN6–VLR, the bandwidth of lysozyme follows a periodic function.