Researches on the Fine Structure of Chromosomes by Means of an Electron Microscope

The Fine Structure of Salivary Chromosomes

“…In the present paper it has been confirmed, in agreement with the work of Yasuzumi et al (1950), that the inter chromatin region is composed of a multitude of chromonemata.…”

“…However, the examination of the minute structures of salivary chromosomes in full-grown larvae of Drosophila virilis made on thin sections by ultrasonic waves has revealed that the interchro matin band consists of about 64 pairs of chromonemata (Yasuzumi, Yosida and Nanjo 1950). In the present paper it has been confirmed, in agreement with the work of Yasuzumi et al (1950), that the inter chromatin region is composed of a multitude of chromonemata.…”

“…give rise to the appearance of dotted band, or they may be quite large and form solid band or disc (Koltzoff 1943, Bridges 1935, Bauer 1936, Painter and Griffen 1937, Pfeiffer 1940, Yasuzumi 1947, Schultz, MacDuffee and Anderson 1949and Yasuzumi, Yosida and Nanjo 1950. Our electron micrographs support such view of the chromosome.…”