Words similar to oocyte
Example sentences for: oocyte
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A number of reports have characterized constitutive expression of HSP70 and HSP90 in both immature oocytes and ovulated eggs from various species [ 32 33 34 35 36 ] . HSP70 and HSP89 are constitutively synthesized in the immature, preovulatory mouse oocyte, although the expression is not heat-inducible [ 37 ] . Levels of HSP70 mRNA decrease following oocyte maturation and ovulation [ 38 ] , and HSP70 is one of the first genes to be transcribed at the onset of zygotic gene activation in the early 2-cell mouse embryo [ 39 40 ] . Interestingly, while previous investigators did not localize HSP70 to the oolemma, they did demonstrate that the presence of anti-HSP70 antibody reduces bovine sperm-egg binding in vitro.
This and other considerations arising from the imperfections of oocyte expression systems [ 79] call for functional measures of AQPs to be made primarily in plant cells or tissues.
During this transition, tightly-regulated post-translational phosphorylation-dephosphorylation events and proteasome-mediated proteolytic reactions regulate the activation and inactivation of signal transduction pathways that control chromatin condensation, nuclear membrane dissolution, microtubule nucleation, and formation of a haploid oocyte [ 8 9 10 ] . Several kinases that exert major roles during OM include maturation promoting factor (MPF) [ 9 11 ] , mitogen-activated protein kinases (MAPKs) [ 12 13 ] , and the product of the c-mos protooncogene Mos kinase [ 14 15 ] . Also, during OM oocytes undergo two highly-regulated metaphase-anaphase transitions (MAT) in which homologous chromosomes are equally and randomly segregated to an oocyte and first polar body and a subsequent division in which equational division of sister chromatids results in a haploid oocyte and a second polar body.
We then tested whether eliminating Ca 2+from the oocyte media would affect this ratio.
Our data show that the primary/secondary transition stage is accompanied by some rather dramatic changes in BMP expression including increased expression of: i) BMP-6, BMP-15, and BMPR IB in the oocyte; ii) BMP-2, BMP-6, and BMPR-IA, -IB and -II in the GC; and iii) BMP-4 and BMP-7 in the theca.
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