文献类型： 外文期刊

作者： Gou, DM ¹ ; Huang, J ² ; Li, WX ² ; Mao, X ² ; Jiang, DH ² ; Hua, WJ ² ; Fan, JH ² ;

作者机构： 1.Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China

2.Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China; Hubei Acad Agr Sci, Biotechnol Res Ctr, Wuhan 430064, Peoples R China

关键词： early human embryo;cDNA library;gene clone

期刊名称：ACTA BIOCHIMICA ET BIOPHYSICA SINICA （ 影响因子：3.848； 五年影响因子：3.67 ）

ISSN： 0582-9879

年卷期： 1999 年 31 卷 6 期

页码：

收录情况： SCI

摘要： The construction, evaluation, and application of cDNA libraries from 3-, 4- and 5-week-old human embryos are described. Total RNAs were extracted from whole embryos using a modified single-step method. mRNA purified by two passes through oligo(dT) columns was reverse-transcripted into single-stranded cDNA. Alkaline agarose electrophoresis showed that the double-strand cDNA fragments ranged from 0.4-9.0 kb and most of them were in the range of 1.0-2.0 kb. After separation on SizeSep 400 Spun columns to eliminate excess adaptors and small cDNA fragments(less than 400 bp), the cDNAs were ligated into pSPORT1 plasmid and lambda ZipLox phage. The plasmid libraries have complexities of 2.6 x 10(5), 1.7 x 10(5) and 2.1 x 10(5) clones; and the phage cDNA libraries have complexities of 3.4 x 10(6), 3.7 x 10(6) and 2.3 x 10(6) clones, respectively. Three whole length cDNAs encoding human CD59, MCP and DAF were amplified by PCR using S-week-old phage library as templates, and human tPA gene with whole length cDNA was screened from 4-week-old plasmid library by hybridization. It was shown that these libraries are of high quality and are suitable to screen rarely expressed genes. The libraries are a valuable source for the study of novel gene expression during human development.