Chromosome structure

The Spiral Structure of Chromosomes

“…In this condition it is sometimes known as the 'minor spiral', a term which has, however, several alternative meanings; for this reason the name 'standard coil' (cf. Nebel, 1939) may perhaps be preferred.…”

The Ontogeny of Chromosome and Chromonema Spirals A Re-evaluation

“…Most of the opinions and critical data have been presented by Kaufmann (1936), Darlington (1937), Kuwada (1939), Nebel (1939), and Sparrow, Huskins and Wilson (1941). The main purpose of this paper is to re evaluate the compression hypothesis as originally elaborated by Wilson and Huskins (1939) following Sax and Humphrey's (1935) suggestion that coiling may be the result of compression of the chromonema within the matrix.…”

“…Kuwada 1936) would seem to consider it to be secondarily derived and, by implication at least, more or less independently determined. As to its fate, the most generally held opinion seems to be that it becomes the standard of the second division (where there is an interkineses be tween the two divisions) and is homologous with the standard coil of mitosis (see Nebel 1939). The McGill group (see especially Huskins 1937) have quite consistently expressed doubt concerning the reality of the minor coil as a true helix but admit a zig-zag appearance in Tril lium.…”

The Role of a Secondary Constriction of a Tumour Chromosome

“…Many properties of the constriction constitute similarities to the traditional centromeric structure (NEBEL, 1939;LEVAN, 1946;TJIO and LEVAN, 1950; LIMA-DE-FARIA, 1956 and others). However, dissimilarities exist.…”