Macromolecular crystallization in a high throughput laboratory-the search phase

Macromolecular crystallization efforts are frequently divided into a search phase, during which approximate conditions are sought, and an optimization phase, when the approximate conditions are optimized to yield crystals of sufficient quality for diffraction work. Faced with the possibility that, o n a yearly basis, many hundreds of proteins might be generated, both in our laboratories and at the laboratories of our collaborators, we have recentl y designed and commissioned a high throughput robotics lab designed for the search phase. The lab is capable of setting up and photographically evalua ting over 60,000 microbatch crystallization experiments per week. In the fi rst four months of operation we have set up crystallization experiments for more than one hundred proteins. (C) 2001 Elsevier Science B.V. All rights reserved.