结构异染色质

用限制酶显带和CMA3/DA/DAPI荧光染色研究中国小型白兔染色体结构异染色质

Study on the Constitutive Heterochromatin of Chinese Small-sized Domestic Rabbit by Restriction Endonuclease Treatment and CMA3 / DA / DAPI Staining

如此大量的结构异染色质的来源及其在染色体组型进化和物种形成中的任务仍是一个谜。

The origin of such large amounts of constitutive heterochromatin and their role in karyotype evolution and speciation remain a mystery .

结构异染色质较多地分布于这6对染色体。

The structural heterochromatin exists mostly in the 6 pairs of chromosomes .

某些染色体除着丝点外，还可见有近中部或近端部的结构异染色质。

It showed CHC , besides centromere , at the positions near end and medium of some chromosomes .

分子生物学技术和基因组计划的发展，促进了对异染色质分子本质的研究。11着丝点C-带异染色质化的程度较高。Y为完全结构异染色质组成。

The development of molecular biology and genome project have fostered much interest in the structure and function of centromeric heterochromatin .

6~＃～14~＃染色体长臂末端有明显的结构异染色质。

There are evident constitutive heterochromatin at end of long arms of 1 # and 6 # - 14 # chromosomes .

八倍体小黑麦中黄色黑麦染色体显C-带和H-带的末端有绿色的带。这是由于黑麦染色体末端结构异染色质含量高所致。

Terminals of C-band and H-band in yellow rye chromosomes of octoploid triticale show green bands , this is because of high content of heterochromatin in terminal of rye chromosomes .

基因抑制从形式上可以分成主动抑制和被动抑制，近程抑制和远程抑制等，但是其分子基础是抑制转录机器复合物（transcriptionalmachinery）或形成抑制性在染色体结构如异染色质等。

There are repression mechanisms like passive and active repressions . short-distance or long-distance repressions , the molecular basis of which is either inhibition of the activity of general transcriptional machinery , or formation of repressive chromatin structures .