Capacitation of acrosome ; process of pregnancy 精子獲能;妊娠的過程。
Effects of acrosome reaction on mammalian sperm by coomassie blue g - 250 staining 考馬斯亮藍(lán)染色評價哺乳動物精子頂體反應(yīng)發(fā)生的效果
Detection of human sperm morphology and acrosome reaction with coomassie brilliant blue staining 考馬斯亮藍(lán)染色法檢測人精子形態(tài)和頂體反應(yīng)
These imply the bsp proteins have important functions in sperm lipid metabolism , sperm capacitation and acrosome reaction 目前在豬及馬的精漿中也都發(fā)現(xiàn)了與bsp蛋白同源的蛋白質(zhì)的存在。
The location of the center tubule in the two species is different . in p . trituberculatus it locates at the top of the acrosome tubule , and in s . chekiangenser it locates at the base 脊尾白蝦邊緣不翻卷,核為泡狀核和絲狀核,棘突由具等距橫紋的纖絲組成,較長。
There are two forms of nucleus in the e . carinicanda sperm : fibrous and vesicular ones the sperm ultrastructures of the p . trituberculatus and s . chekiangense consist of nucleus cup , radial arm , acrosome 2 .精子結(jié)構(gòu)羅氏沼蝦與脊尾白蝦的精子結(jié)構(gòu)相近,呈圖釘狀,由棘突、頂帽和精核組成。
The head of spermatozoa contains a nucleus but no acrosome . the nuclear fossa developes well . during the process of spermtogenesis , within the nucleus the chromatin condenses step by step into wads , among which are loose chromatin fibers 成熟精子頭部無頂體,主要為核占據(jù),精子形成過程中,細(xì)胞核中的染色質(zhì)濃縮成致密的團(tuán)塊狀,團(tuán)塊狀的染色質(zhì)之間分布著松散的纖維狀染色質(zhì)。
Northern analysis revealed that p3galt - l was exclusively expressed in the brain while that p4galt - l was expressed highly in testis , moreover , sperm surface p4galt - l was suggested to play a significant role in signal transduction involving the acrosome reaction in the mouse . in the present study , we mainly detected the developmental expression and function of p - galactosyltransferases in mouse brain and testis . we first characterized the developmental expression of 3galt - l in mouse brain - 1 , 3 -半乳糖基轉(zhuǎn)移酶- 1 ( 3galt - 1 )主要在腦中表達(dá),而- 1 , 4 -半乳糖基轉(zhuǎn)移酶- 1在睪丸中表達(dá)較高,且精子細(xì)胞表面的- 1 , 4 -半乳糖基轉(zhuǎn)移酶- 1在精卵結(jié)合后的頂體反應(yīng)中發(fā)揮了重要的生理作用。
Nucleoli do not emerge in this process . the number of the organelles increase until secondary spermatocyte stage . mitochondria accumulate together , merging together with lysosomes and golgi bodies at the early spermatid stage , and finally the lamellar structure is formed , which forms the acrosome at last 在精子發(fā)生過程中,線粒體、內(nèi)質(zhì)網(wǎng)和核糖體逐漸增多,其中線粒體數(shù)目在次級精母細(xì)胞階段達(dá)到頂峰,并形成線粒體區(qū),精細(xì)胞早期核內(nèi)出現(xiàn)膜性泡結(jié)構(gòu),同時次級溶酶體與高爾基體大量存在,這些細(xì)胞器共同形成片層復(fù)合體,并參與頂體的形成。
In order to investigate the role of mannose receptor ( mr ) of human sperm , the zona free hamster eggs were pre - incubated with purified mr ( pmr ) isolated from motile human sperm by mannose - agarose gel affinity chromatography . the ultrastuctural alteration and cortical granule exocytosis of the eggs were then observed by transmissian electron microscope and tritc - lca immunofluorescence microscope , respectively . the mice were immunized with pmr and the antiserum was raised . after capacitation and induction of the acrosome reaction , the human spermatozoa and oocytes were incubated with the antiserum . then the sperm penetration assay was undertaken 為了進(jìn)一步探討人精于mr在精卵融合中的作用,本文采用改良后的甘露糖-瓊脂糖凝膠親和層析法分離純化人精子mr ,并將提純的人精子甘露糖受體( purifiedmannosereceptor , pmr )作用于去透明帶的金黃地鼠卵母細(xì)胞,運用透射電子顯微鏡技術(shù)和羅丹明偶聯(lián)的兵豆凝集素( tritc - lca )免疫熒光標(biāo)記技術(shù)觀察pmr對卵子的影響。
a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg
百科解釋
The acrosome is an organelle that develops over the anterior half of the head in the spermatozoa (sperm cells) of many animals. It is a cap-like structure derived from the Golgi apparatus.