Cover photograph (Copyright © 2002, American Society for Microbiology. All Rights Reserved.): The ubiquitin ligase Siah1a is required for completion of meiosis I in male mice. The image shows a wild-type metaphase I spermatocyte stained with antibodies to SCP3 (green) and α-tubulin (red). Each of the 40 SCP3 foci represents a superimposed pair of sister kinetochores. (See related article in April 2002, issue 7: vol. 22, p. 2294.)