CDNA LIBRARY CONSTRUCTION FROM SMALL AMOUNTS OF UNFRACTIONATED RNA - ASSOCIATION OF CDNA SYNTHESIS WITH POLYMERASE CHAIN-REACTION AMPLIFICATION

被引:21
作者
DOMEC, C
GARBAY, B
FOURNIER, M
BONNET, J
机构
[1] Groupe d'Etude de l'Expression Génétique du Système Nerveux, Institut de Biochimie Cellulaire et Neurochimie, CNRS, 33077 Bordeaux Cedex
关键词
D O I
10.1016/0003-2697(90)90630-R
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
We describe here a general and simple procedure for cDNA library construction making use of in vitro amplification of cDNA by polymerase chain reaction (PCR). The first-strand cDNA is synthesized from total RNA with a primer EcoRI-(dT)17 and oligo(dG) tailed. An oligonucleotide, EcoRI-BamHI-(dC)13, is used to prime the second-strand synthesis by the thermostable DNA polymerase of Thermus aquaticus. The doublestranded cDNA is then amplified directly by PCR. A study of the effect of the elongation time on the PCR products showed that a long extension time is necessary to overcome the size heterogeneity of the cDNA population. Starting from 1 μg of total brain RNA, the products obtained ranged from 200 to more than 2000 bp. The presence of the myelin basic protein cDNA sequence was determined. A λgt10 library containing 2 × 106 clones was estblished with the amplified cDNA. No sequences originating from rRNA were detected by Southern blot analysis. The ability to produce representative cDNA libraries from minute amounts of total RNA by this protocol should have many applications to studies of gene expression in small amounts of tissues or cells. © 1990.
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页码:422 / 426
页数:5
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