Crabb WD, Firshein W, Infante AA. A potential DNA replication complex isolated from sea urchin embryos by renografin gradient centrifugation.
BIOCHIMICA ET BIOPHYSICA ACTA 1980;
609:456-463. [PMID:
7437435 DOI:
10.1016/0005-2787(80)90119-7]
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Abstract
A complex containing deoxyribonucleic acid, protein and lipid has been isolated from the nuclei of the sea urchin Stronglocentrotus pupuratus by gentle lysis of nuclei and centrifugation of the lysate in a renografin gradient. The complex is similar in several respects to DNA-membrane complexes isolated by the sarkosyl M-band technique [1]. These include the following: 1, most of the cellular DNA is present in the complex but the bulk of the DNA may be removed by sonication or nuclease treatment; 2, nascent DNA is preferentially found in the complex; and 3, destruction of membrane/protein components removes DNA found in the complex.
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