染色质纤维

应用SEM和TEM研究两种蝗虫减数分裂染色体的染色质纤维的包装&多级双股螺旋结构

Packing of the chromatin fiber of meiotic chromosomes in two species of grasshoppers under SEM TEM Multiple double-strand helical structure

250&300染色质纤维沿精细胞长纵轴连接在CA结构的基部。

The 250-300 A chromatin fibers along the longitudinal axis of the spermatid are attached to the base of CA structure .

牛肾细胞染色体中染色质纤维的包装及RNP的分布

Packing of the Chromatin Fibers and the Distribution of RNP in BK Chromosomes

结论：大鼠大脑细胞核10nm染色质纤维核小体重复长度不受老化过程影响；

Conclusion : The repeat length of the nucleosomes in 10 nm chromatin fibers in the cerebral nuclei is not associated with aging .

进入第5期，染色质纤维聚集成均匀的致密结构。

At the stage 5 , the chromatin fibers gathered completely and became evenly dense .

当精细胞核向长形转变时，染色质纤维解旋并结合在一起形成缎带结构。

As spermatid nucleus elongates , the chromatin fibers are unwound and join together to form ribbon structure .

在联合发生后，染色质纤维解聚成环状附着在侧带上。

After synapsis , unwound chromatin fibers in the form of loops are in association with the lateral elements .

爪蟾卵无细胞系统中核的自组装和组装核染色质纤维的研究

A Study of Nuclear Self-assembly and the Chromation Fibre of the Assembled Nuclei in the Cell-free System of Xenopus Eggs

时期Ⅲ，细胞核进一步延长，核内染色质纤维变粗并沿核纵轴方向排列有序；

Stage ⅲ, the nucleus went on prolonging and the chromatin fibers in it condensed and was put in a order of parallel to the longitudinal axis of the nucleus .

这一水平涉及所有的编码区、各种能结合序列特异性蛋白质因子的调控序列以及决定染色质纤维三维折叠形态的序列元件。

This level includes all coding regions , the wide variety of regulatory sequences that bind sequence-specific protein factors , and sequence elements that may have a role in determining the 3D folding of the chromatin fibre .

时期Ⅱ，精子细胞顶体囊泡扁平，细胞核延长，染色质浓缩成短丝状的染色质纤维；

Stage ⅱ, the spermatid acrosomal vesicle flattened and chromatin condensed into fibers like short filaments and the nucleus prolonged ;