The phase in mitosis in which the chromosome pairs are aligned along the axis of the cell just prior to telophase.处于细胞有丝分裂末期前的一个时期,染色体对沿着细胞轴排列。...[继续阅读]

    Sequences repeated many times on the genome. These sequences vary in length from 3 to 5 base pairs to 300 base pairs and are found on the genome in hundreds to thousands of copies. Some of the repetitive DNA makes up the satellite DNA,a distinct band from...[继续阅读]

    The oncogene carried by the McDonough strain of FELINE SARCOMA VIRUS. 猫肉瘤病毒McDonough株携带的致癌基因。...[继续阅读]

    A molecule made up of several glucose residues and one of the products resulting from α-amylase hydrolysis of starch. 一种由几个葡萄糖残基组成的分子,是由α-淀粉酶水解淀粉形成的小分子物质。...[继续阅读]

    A type of insertion sequence that carries the gene for resistance to the antibiotic,kanamycin. See TRANSPOSON. 一类插入序列,携带有抗抗生素——卡那霉素的基因。参阅transposon。...[继续阅读]

    High-performance liquid chromatography. A variation of liquid chromatography that uses small (three to ten μm in diameter)silica beads to achieve high-resolution separations.高效液相层析,液相层析的一种形式,使用小硅胶颗粒(直径3～10μm)获得高分辨率的分离物质。...[继续阅读]

    The theory that the stimulation of an immune response specific caused by the introduction of a foreign antigen results from proliferation of a single preexisting antibody-producing cell of the immune system such that a clone of cells bearing antibodies sp...[继续阅读]

    An enzyme,isolated from bacterial cells infected with the bacteriophage,T4,that catalyzes the formation of a covalent bond between the phosphate group on the 5′ end of either single-stranded DNA or RNA and the 3′ hydroxyl end of either single-stranded DNA...[继续阅读]

    The change in the number of organisms in a population divided by the length of the time interval over which the change in the population number took place.For example,a culture of cells in which there were 2500 organisms on one day and 7000 organisms thre...[继续阅读]

    An enzyme involved in the splicing of transcripts in the yeast mitochondrial cytochrome b gene. The RNA maturase gene is unusual in that part of the gene is found in an intron of the cytochrome b gene itself.一种参与酵母线粒体细胞色素b基因转录本拼接的酶。RNA成熟酶基因的不寻...[继续阅读]