Sticking point

时间:2019-03-07 08:13:01166网络整理admin

TEAMS of French and Japanese researchers have independently found that a cell surface protein called CD9 is essential for normal sperm and egg fusion. The researchers were originally interested in CD9 because it plays a role in cell adhesion, and tumours with low amounts of the protein seem more likely to spread. So both Claude Boucheix of INSERM in Villejuif, France, and Eisuke Mekada at the National Institute of Infectious Diseases in Tokyo bred mice that lacked the gene for CD9 (Science, vol 287, p 319). The mice appeared normal but had reduced fertility,