Verma R S, Jacob J P, Babu A
Can J Genet Cytol. 1986 Aug;28(4):628-30. doi: 10.1139/g86-092.
The heterochromatin in Indian muntjac (Muntiacus muntjak) is located at the periphery of primary constrictions of all the chromosomes. The X chromosome contains significantly larger amounts of heterochromatin than the rest of the complement by C-banding technique. However, the small portion of C-band region was found to be resistant by restriction endonuclease HaeIII (5'...GG decreases CC...3') and was clearly visible on the nucleus. Therefore, the position of this large heterochromatic segment is examined at somatic metaphases. The distribution of the heterochromatin of the X chromosome observed in Indian muntjac is contrary to the general pattern observed in other species, i.e., the chromosomes consisting greater amount of heterochromatin are located more peripherally than those with lesser amount. However, the smaller Y chromosome (Y1) is frequently found at the periphery. The present findings suggest that the role of heterochromatin organization in the nucleus vary between different heterochromatic segments of the same species and vary from species to species.
印度麂（Muntiacus muntjak）的异染色质位于所有染色体初级缢痕的周边。通过C带技术发现，X染色体所含的异染色质比其余染色体组明显更多。然而，发现C带区域的一小部分对限制性内切酶HaeIII（5'...GG↓CC...3'）具有抗性，并且在细胞核上清晰可见。因此，在体细胞中期检查了这个大的异染色质片段的位置。在印度麂中观察到的X染色体异染色质分布与在其他物种中观察到的一般模式相反，即异染色质含量较多的染色体比含量较少的染色体更位于周边。然而，较小的Y染色体（Y1）经常出现在周边。目前的研究结果表明，异染色质在细胞核中的组织作用在同一物种的不同异染色质片段之间有所不同，并且在不同物种之间也有所不同。
