Salamone M F, Nachtwey D S
J Protozool. 1979 May;26(2):227-31. doi: 10.1111/j.1550-7408.1979.tb02765.x.
The fate of extranuclear chromatin bodies (ECBs) formed by exclusion of macronuclear material at the time of karyokinesis was followed quantitatively in Tetrahymena pyriformis strain GL-I. In a logarithmic growth phase culture, 51% of the dividing cells produced one (43%) or more (8%) ECBs. Most of these gradually disappear before the next cell division, but approximately 13% are retained and carried into subsequent cell cycles. The random distribution of ECBs into anterior or posterior daughter cells, their staining and morphological characteristics, and their rapid loss in cells in starvation medium, all indicate that ECBs play no more of a role in cellular activity than that of an internally produced food vacuole.
在梨形四膜虫GL-I株中，对有丝分裂时通过排除大核物质形成的核外染色质体（ECBs）的命运进行了定量追踪。在对数生长期培养物中，51%的分裂细胞产生了一个（43%）或更多（8%）的ECBs。其中大多数在下次细胞分裂前逐渐消失，但约13%被保留并进入后续细胞周期。ECBs随机分布到前或后子细胞中，它们的染色和形态特征，以及它们在饥饿培养基中的细胞中迅速消失，所有这些都表明ECBs在细胞活动中的作用不超过内部产生的食物泡。
