Megaloblastic maturation is the morphologic result of any biochemical defect that causes a slowing of DNA synthesis. The hallmark of this megaloblastosis is nuclear-cytoplasmic dissociation; the ...

This is a preview. Log in through your library . Abstract Nucleotide metabolism was studied in apical 5.0 mm root tips of corn plants (Zea mays L., cv. Pioneer 3906) hydroponically cultured for 7 d ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 73, No. 8 (Aug., 1976), pp. 2867-2871 (5 pages) Purine and pyrimidine metabolites were measured in erythrocytes, ...

If you thought that the RNA world hypothesis had comfortably eclipsed the DNA world hypothesis, think again. As far as molecular biologists at the MRC Laboratory are concerned, the two hypotheses are ...