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除了双链配对的双螺旋结构以外，DNA可以形成一些更高级的结构比如G四链体（G-quadruplex，图A）。G四链体是一种四链结构并且由二层以上鸟嘌呤平面组成，每个鸟嘌呤平面含有4个相互氢键配对的鸟嘌呤碱基（图B）。端粒DNA的TTAGGG序列可以形成由3层鸟嘌呤平面组成的分子内G四链体结构，这种结构形成可以阻挡端粒酶对端粒的延伸。除了端粒DNA以外，越来越多的可以形成G四链体的DNA序列在人和其...
Rapid Sex Identification of Chicken by Fluorescence In Situ Hybridization Using a W Chromosome-specific DNA Probe
Chicken W Chromosome XhoI family PCR FISH Sexing
2016/4/12
It has been known that the sex of chicken cells can be most accurately identified by fluorescence in situ hybridization (FISH). However, the presently available FISH has not been widely used for sex i...
DNA Fingerprint Polymorphism of 3 Goat Populations from China Chaidamu Basin
RAPD Marker Native Goat Population Genetic Relationship Chaidamu Basin of China
2016/4/11
The DNA fingerprint polymorphism and the genetic relationship were studied by RAPD technology on Chaidamu goat (CG), Chaidamu Cashmere goat (CCG) and Liaoning Cashmere goat (LCG) from Chaidamu Basin o...
Detection of DNA Fragment to Differentiate Korean Cattle
RAPD-PCR Specific DNA Probe DNA Fingerprinting Hanwoo
2016/4/11
In order to identify and develop the specific DNA marker for the identification of Hanwoo (Korean Cattle) from other breeds, a specific DNA marker of 519 bp was identified and sequenced from polymorph...