http://www.jbc.org/content/250/24/9330.full.pdf

Purification of mRNA guanylyltransferase and mRNA (guanine-7-) methyltransferase from vaccinia virions.

The Exonuclease Activity of Human Apurinic/Apyrimidinic Endonuclease (APE1) BIOCHEMICAL PROPERTIES AND INHIBITION BY THE NATURAL DINUCLEOTIDE Gp4G

A survey of carotenoid-protein complexes is presented. Distinction is made between astaxanthin-proteins in which the absorption band of the carotenoid is unaltered in shape, and carotenoid-lipoglycoprotein complexes. The proposal by Buchwald and Jencks 79 that the carotenoid is twisted about the double bonds of the polyene chain, is discussed and sustained for astaxanthin-proteins. A mode of binding for the carotenoid in these complexes is proposed, involving hydrogen-bonding of keto groups of the polyene to imide groups of peptide bonds of the apoprotein.

/pdf/carotenoid-protein-complexes-27j8giqfkn.pdf

Carotenoid-Protein Complexes

Non-adenylylated bis(5'-nucleosidyl) tetraphosphates occur in Saccharomyces cerevisiae and in Escherichia coli and accumulate upon temperature shift or exposure to cadmium.

D.K. McClean

Papers

Studies on the biosynthesis and role of diguanosine tetraphosphate during growth and development of Artemia salina