Parameters for crystal growth of ribosomal subunits

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Abstract
A systematic analysis of the parameters that control the crystal growth of the large subunit of ribosomes from B stearothermophilus has been carried out. Several parameters have been identified and classified according to their significance. It was found that only biologically active particles can crystallize and that the critical period for the crystallization process is the first few days, during which changes in the volume and content of the crystallization drop are of importance for both nucleation and crystal growth. Consequently, an experimental procedure for fine control of these variables has been developed. As a result of these studies, the reproducibility of crystal formation was increased, and larger and more stable crystals have been obtained.