期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1971
卷号：68
期号：6
页码：1169-1173
DOI：10.1073/pnas.68.6.1169
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Chloroplast DNA of the protozoan flagellate, Euglena gracilis, exists as circular molecules, 40 {micro}m in contour length, as shown by electron microscopy and buoyant density analyses.
关键词：electron microscopy ; density gradient centrifugation ; mitochondrial DNA
