A geneticist who studied recombination in bacteria and bacteriophage. As a graduate student in the laboratory of Joshua Lederberg,he carried out the critical experiments that led to the discovery of transduction.研究细菌和噬菌体(基因)重组的遗传学家。作为Joshua Lederberg实验室的一...[继续阅读]

    Complexes of lipids and proteins. The most important and abundant examples of lipoproteins are the lipoproteins that function to transport fats in the blood and that are classified mainly in terms of their densities: high-density lipoproteins (HDLs),inter...[继续阅读]

    A molecule that,because it structurally resembles a certain inducer of transcription,can act to induce transcription in lieu of the authentic inducer,for example,IPTG in lieu of lactose as a gratuitous inducer of the lac operon。与转录诱导物结构类似的分子,可代替真正的诱导物诱导...[继续阅读]

    One part of a complex biological molecule such as an enzyme or ribosome.The subunits combined together constitute the biologically active molecule. 酶和核糖体等复杂生物分子的一个组成部分。所有亚基结合在一起才会组成有生物活性的分子。...[继续阅读]

    Outside the cell.细胞的外面。...[继续阅读]

    A solution of sodium chloride at a concentration exactly equivalent (8 grams per liter; 0.8%) to that found in bodily fluids.一种与体液中的浓度几乎相等的氯化钠溶液(8克/升;0.8%)。...[继续阅读]

    Abbreviation for ribosomal RNA,the RNA strands that are,together with the ribosomal proteins,the basic components of ribosomes. In eukaryotic cells there are two major rRNAs denoted as 18S (found in the small ribosome subunit) and 28S (found in the large ...[继续阅读]

    Any of the globular serum proteins secreted by cells of the immune system for the purpose of dealing with foreign antigens. Immunoglobulins are divided into five classes: IgM,IgG,IgA,IgD,and IgE. 由免疫系统的细胞分泌的球状血清蛋白,用来对付外来抗原。免疫球蛋白分为5种:...[继续阅读]

    A device for removing solvent from large volumes of a solution by evaporation to concentrate the solute. A flash evaporator consists of a heated,rotating glass sphere with a tube to allow the evaporating solvent to exhaust.一种通过蒸发将溶剂从大量的溶液中除去以浓缩溶质的设备。...[继续阅读]

    A recombinant DNA technique in which double-stranded cDNA is spliced into vectors so that the gene can be amplified or expressed. 将双链cDNA拼接入载体以使相关基因扩增或表达的DNA重组技术。...[继续阅读]