传统染色体核型分析是染色体疾病诊断的“金标准”[1],但培养周期长、易培养失败,对5Mb以下的染色体缺失/重复无法正确检出。BACs on Beads(BoBs)技术是一种快速产前诊断技术,将DNA探针固定在经过荧光编码的Luminex微球表面,采用微球阵...传统染色体核型分析是染色体疾病诊断的“金标准”[1],但培养周期长、易培养失败,对5Mb以下的染色体缺失/重复无法正确检出。BACs on Beads(BoBs)技术是一种快速产前诊断技术,将DNA探针固定在经过荧光编码的Luminex微球表面,采用微球阵列分析同时检测5种染色体非整倍体(13、18、21、X和Y)及常见的微缺失综合征(Wolf Hirschhorn综合征、Cri du Chat综合征、Williams Beuren综合征、Langer Giedion综合征、Prader Willi/Angelman综合征、Miller Dieker综合征、Smith Magenis综合征及DiGeorge综合征),大大缩短了检测时间,提高了产前诊断效率。本文对4639份羊水进行BoBs快速检测,探讨其在检测微缺失/微重复综合征中的应用价值。展开更多
A 10-fold BAC library for the giant panda was constructed and nine BACs were selected to generate finish sequences.These BACs could be used as a validation resource for the de novo assembly accuracy of the whole genom...A 10-fold BAC library for the giant panda was constructed and nine BACs were selected to generate finish sequences.These BACs could be used as a validation resource for the de novo assembly accuracy of the whole genome shotgun sequencing reads of the giant panda newly generated by Illumina GA sequencing technology.Complete Sanger sequencing,assembly,annotation and comparative analysis were carried out on the selected BACs of a joint length 878 kb.Homologue search and de novo prediction methods were used to annotate genes and repeats.Twelve protein coding genes were predicted,seven of which could be functionally annotated.The seven genes have an average gene size of about 41 kb,an average coding size of about 1.2 kb and an average exon number of 6 per gene.Besides,seven tRNA genes were found.About 27 percent of the BAC sequence is composed of repeats.A phylogenetic tree was constructed using a neighbor-join algorithm across five species,including the giant panda,human,dog,cat and mouse,which reconfirms dog as the most closely related species to the giant panda.Our results provide detailed sequence and structure information for new genes and repeats of the giant panda,which will be helpful for further studies about the giant panda.展开更多
文摘A 10-fold BAC library for the giant panda was constructed and nine BACs were selected to generate finish sequences.These BACs could be used as a validation resource for the de novo assembly accuracy of the whole genome shotgun sequencing reads of the giant panda newly generated by Illumina GA sequencing technology.Complete Sanger sequencing,assembly,annotation and comparative analysis were carried out on the selected BACs of a joint length 878 kb.Homologue search and de novo prediction methods were used to annotate genes and repeats.Twelve protein coding genes were predicted,seven of which could be functionally annotated.The seven genes have an average gene size of about 41 kb,an average coding size of about 1.2 kb and an average exon number of 6 per gene.Besides,seven tRNA genes were found.About 27 percent of the BAC sequence is composed of repeats.A phylogenetic tree was constructed using a neighbor-join algorithm across five species,including the giant panda,human,dog,cat and mouse,which reconfirms dog as the most closely related species to the giant panda.Our results provide detailed sequence and structure information for new genes and repeats of the giant panda,which will be helpful for further studies about the giant panda.
