English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

It is well established that ribosomes and most of the mRNA needed to support protein synthesis during early stages of development are synthesized during oogenesis (Brown and Littna, 1964) . Large quantities of rRNA and its associated proteins are synthesized by the nucleolus and transferred from nucleus to the cytoplasm (Perry, 1966). How rRNA is transferred from nucleus to cytoplasm remains obscure although several modes of transfer of material have been suggested . These include (a) passage through pores or annuli in the nuclear membranes (Anderson and Beams, 1956 ; Kessel, 1966 ; Stevens and Swift, 1966), (b) blebs or outpocketings of the outer nuclear membrane (Kessel, 1966, 1968; Scharrer and Wurzelmann, 1969 a), (c) partial disappearance of the nuclear envelope (Tashiro et al ., 1968), (d) transport through perinuclear microtubules (Scharrer and Wurzelmann, 1969 b), and (e) nucleolar buds surrounded by pinched-off portions of nuclear envelope (Szollosi, 1965) . The present study describes vesicles within the oocyte nucleus of the spider crab, Libinia emarginata L ., and presents evidence that they play a role in nucleocytoplasmic exchange .

POSSIBLE ROLE OF INTRANUCLEAR MEMBRANES IN NUCLEAR-CYTOPLASMIC EXCHANGE IN SPIDER CRAB OOCYTES