中文摘要：

LUG蛋白属于WD40超家族基因，具有7个重复的WD40结构域，参与花器官的发育。本项研究系统鉴定了7个拟南芥和5个大白菜的LUG基因，并对这些基因编码的蛋白质序列进行了序列保守性和系统进化分析。结果表明，除了AtLUG6含有5个重复的WD40结构域之外，其余所有的LUG蛋白都具有7个重复的WD40结构域。在进化上，LUG蛋白家族可分为两个不同的亚家族，并且这种特征在拟南芥和大白菜分离之前就已经形成。

英文摘要：

LUG protein family is a kind of WD40 super family genes which features the existence of 7 repeat WD40 domains. The members of this family play an important role in the development of flower. In this study, bioinformatics analysis identified 7 and 5 LUG genes in Arabidopsis and Chinese cabbage, respectively. The conserved sequences of these proteins were analyzed and a polygenetic tree was constructed based on the corresponding cystatin proteins from Arabidopsis and Chinese cabbage. The results suggested that, besides the AtLUG6 gene contains 5 repeat, all the other LUG genes all contain 7 repeat WD40 domains. The polygenetic analysis of these sequences indicated that they could be divided into two sub-family groups and the main character for LUG genes might have existed before the split of Chinese cabbage and Arabidopsis.