The Fine Structure of Salivary Chromosomes
1951 年 16 巻 3 号 p. 233-242
詳細
1951 年 16 巻 3 号 p. 233-242
The microstructure of the salivary chromosome of Drosophila virilis has been investigated by means of the electron microscope. Flemming's mixture has been used for fixing, and the replica-shadow casting method employed. Thus the most minute structure of the chromosome has been elucidated.
1. The interchromatin regions are composed of a multitude of longitudinal strands, namely, chromonemata. These show beaded struc-ture with a periodicity between 30mμ and 60mμ.
2. The chromomeres distinctly appear when the chromosome has been subjected to digestion with desoxyribonuclease or trichloracetic acid.
3. The matrix is often removed from the chromosomes; but under favorable circumstances it can be observed along with the chromone-mata.
