null adj. 1.無(wú)效力的,無(wú)束縛力的。 2.無(wú)效的,無(wú)用的,無(wú)益的;無(wú)價(jià)值的。 3.沒(méi)特征[個(gè)性]的,沒(méi)表情的。 4.〔罕用語(yǔ)〕不存在的,沒(méi)有的;零(位)的;空的。 n. 【數(shù)學(xué)】零,零位;空;【無(wú)線電】零訊號(hào),微弱訊號(hào)。 a null indicator 零示器;零位指示器。 the null method 衡消法。 null and void 【律】無(wú)效;失效(This check is null and void. 本支票無(wú)效)。 vt. 使無(wú)效。
The targeted disruption of mouse rbp-j revealed that homozygous null mutants die before 10.5 days postcoitum ( dpc ) with various abnormalities, including growth retardation and defects in the central nervous system and somites 5天死亡,同時(shí)伴隨一系列異常,包括神經(jīng)發(fā)育過(guò)度及體節(jié)發(fā)育的缺陷,說(shuō)明rbp-j在哺乳動(dòng)物胚胎發(fā)育中發(fā)揮著重要作用。
Here we found g proteins also function in leaf, silique development and the yield of pollen microspore . we observed several traits or characters in the offsprings of gpal, agbl null mutation and gpa1 overexpression lines and found that the width of mutants " lamina is larger than that of the wild type, whereas the lamina length, petiole length and rosette diameter is smaller than the wild type, the ga overexpression lines is different from the mutants; the silique length and the pedicel length is larger in mutants than that of wild type, and slightly smaller in overexpression lines than the control; the morphometric character in silique tip is different in gpal from agbl mutants; the yield of pollen microspore is larger in null mutants than wild type whereas smaller in overexpression lines 實(shí)驗(yàn)中我們跟蹤觀察了多代異三聚體g蛋白a亞基超表達(dá)轉(zhuǎn)基因植株及a,p亞基缺失突變體的表型特征,發(fā)現(xiàn)突變體的葉片寬度大于對(duì)應(yīng)的野生型,葉片長(zhǎng)度,葉柄長(zhǎng)度及蓮座直徑小于野生型,而超表達(dá)植株的上述某些特征與突變體相反;gp時(shí)突變體的長(zhǎng)角果長(zhǎng)度,花梗柄部長(zhǎng)度大于野生型,而超表達(dá)ga植株種英則略小于對(duì)照;gpal突變體長(zhǎng)角果尖端未出現(xiàn)咭乙i突變體的特征:gpal,口gbl突變體花粉生成量大于野生型,而超表達(dá)ga植株的花粉生成量則略小于對(duì)照。
The targeted disruption of mouse rbp-j revealed that homozygous null mutants die before 10.5 days postcoitum ( dpc ) with various abnormalities, including growth retardation and defects in the central nervous system and somites . in order to assess the function of rbp-j, a yeast two-hybrid screening using rbp-j as a bait protein was performed and a nuclear matrix protein, mint was isolated sdpc胚胎和人的hela細(xì)胞cdna文庫(kù)中篩選到一個(gè)可以與rbp斗相互作用的新蛋白ram7,后發(fā)laram7與mmt(msxzinter肌tingnucleartargetprotein)為同一蛋白。