31 molecules of carbon/nm^3 of protein: 8.7 molecules of nitrogen/nm^3 of protein unitless
||Weitz, Joshua S. Quantitative Viral Ecology, Dynamics of Viruses and Their Microbial Hosts, Princeton University press, Chapter one. What Is a Virus? p.13 2nd paragraph
||Jover, L. F., Effler, T. C., Buchan, A., Wilhelm, S. W., and Weitz, J. S. (2014). The el- emental composition of virus particles: implications for marine biogeochemical cycles. Nature Reviews Microbiology , 12:519–528 doi: 10.1038/nrmicro3289.PubMed ID24931044
||P.13 2nd paragraph: "In contrast (to average molecular formula of DNA base pair, see BNID 113052), the amino acids that constitute proteins have no phosphorus, but they do contain carbon and nitrogen—again, the particular ratio depends on amino acid composition. Analysis of primary sequence information for more than 2000 viral proteins reveals that they have, on average, 31 molecules of carbon and 8.7 molecules of nitrogen/nm^3 of protein (primary source) that is, a C:N ratio of 3.6:1—slightly more carbon rich and nitrogen poor than DNA."