MOLECULAR SIZE AND CIRCULARITY OF DNA IN CELLS OF MAMMALS AND HIGHER PLANTS

Abstract
Examination of DNA extracted from wheat embryo and boar sperm by sedimentation analysis and electron microscopy indicates the following: (1) molecular size is variable, the upper limit being undetermined but exceeding 2 X 108 avograms; (2) at least part of the DNA from boar sperm is in the form of circles.