The development of branched silk gland nuclei.

Abstract:

:Nuclei in the giant polyploid silk gland cells of Calpodes ethlius grow by endomitosis and can develop hundreds of branches during larval life. The shape of the these nuclei is characteristic for each region of the gland. We have found shape to be correlated with arrangement of the nuclear matrix. Scanning electron microscopy showed nuclear matrices with shapes similar to those of feulgen stained nuclei. Profiles of isolated matrices seen by transmission electron microscopy had filaments aligned parallel to the long axis of nuclear branches. DNA stained by Hoechst had a similar parallel alignment within the branches. Nuclear shape may be maintained by a small number of components, since electrophoretic analysis showed only a few abundant polypeptides in the matrix fraction. Silk gland nuclei have some of the same nuclear matrix antigens found in smaller, more regularly shaped, eukaryote nuclei.

journal_name

Tissue Cell

journal_title

Tissue & cell

authors

Henderson SC,Locke M

doi

10.1016/0040-8166(91)90036-s

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

867-80

issue

6

eissn

0040-8166

issn

1532-3072

pii

0040-8166(91)90036-S

journal_volume

23

pub_type

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