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(名词解析)

Q-banding (Q带)

正确答案

又叫荧光分带法。用氮芥喹吖因(quinacrine)荧光染料染色,在紫外光激发下,显现明暗不同的带区,可在荧光显微镜下观察。一般富含AT碱基的DNA区段表现为亮带,富含GC碱基的区段表现为暗带。此法的优点是分类简便,可显示独特的带型。缺点是标本易褪色,不能做成永久性标本片。

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