Brady T, Bailey J F, Payne M B
Chromosoma. 1977 Mar 16;60(2):179-86. doi: 10.1007/BF00288464.
Individual polytene chromosomes have been isolated from Chironomus stigmaterus for scanning electron microscope observations. The three dimensional ultrastructure of these chromosomes consists of a series of chromatin strands extended in the interbands and more tightly coiled or folded in the banded regions. The nucleolus is observed to be a dense disc or doughnut shaped structure surrounding the chromosome while the Balbiani Rings appear as diffuse regions consisting of both fibrillar and granular elements.
已经从污斑摇蚊中分离出单个多线染色体用于扫描电子显微镜观察。这些染色体的三维超微结构由一系列在间带中延伸且在带区更紧密地盘绕或折叠的染色质链组成。观察到核仁是围绕染色体的致密圆盘状或甜甜圈状结构，而巴尔比亚尼环则表现为由纤维状和颗粒状成分组成的弥散区域。
