Don W. Fawcett (2011) CIL:11037, Sus scrofa scrofa, Leydig cell. CIL. Dataset

Transmission electron micrograph of Leydig cell nucleus from the domestic boar contains a region (arrow) thought to represent the single X chromosome which is largely heterochromatic. The chromosome is closely associated with the prominent nucleolus. Figure 137 from Chapter 4 (Nucleus) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. A PDF copy of the corresponding chapter is available on the ASCB's BioEDUCATE website.来自家猪的莱迪氏细胞核透射电子显微照片中，包含一个（箭头所示）被认为代表单个性别染色体的区域，该染色体主要呈现异染色质状态。染色体与显著的核仁紧密相连。此图出自《细胞》第二版第四章（细胞核）的137图，作者为Don W. Fawcett M.D.。相应章节的PDF副本可在ASCB的BioEDUCATE网站上查阅。