Di Franco C, Pisano C, Dimitri P, Gigliotti S, Junakovic N
Centro per lo Studio degli Acidi Nucleici C.N.R., Università La Sapienza, Roma, Italy.
Chromosoma. 1989 Dec;98(6):402-10. doi: 10.1007/BF00292785.
The genomic distribution of elements of the copia, 412, B 104, mdg 1, mdg 4 and 1731 transposon families was compared by the Southern technique in DNA preparations extracted from brains, salivary glands and adult flies of two related Drosophila lines. The copia, 412 and mdg 1 sequences were also probed in DNA from sperm, embryos, and 1st and 2nd instar larvae. The homogeneity of the patterns observed shows that somatic transposition is unlikely to occur frequently. A correlation between mobility and the euchromatic or heterochromatic location of transposable elements is discussed. In addition, an explanation of the variable band intensities of transposable elements in Southern autoradiographs is proposed.
运用Southern技术,对从两个相关果蝇品系的大脑、唾液腺及成年果蝇中提取的DNA样本进行分析,比较了copia、412、B 104、mdg 1、mdg 4和1731转座子家族元件的基因组分布情况。同时,也用copia、412和mdg 1序列对精子、胚胎以及一龄和二龄幼虫的DNA进行了探测。观察到的图谱均一性表明,体细胞转座不太可能频繁发生。文中讨论了转座元件的移动性与其在常染色质或异染色质位置之间的相关性。此外,还对Southern放射自显影片中转座元件可变带强度给出了解释。