| MadSci Network: Biochemistry |
hello Susan, Well I couldn't find any sort of standard list for anthocyanin extinction coefficients, but I did find some web resources that may help you. This site doesn't have any extinction coefficients, but it does discuss theory of light absorption in plants. I thought you might find it intersting (and useful!): http://www.iupui.edu/~geotech/g436/lecture3/lecture3.html The next two sites both give extinction coefficients of anthocyanin. The catch is that they are different. one gives a value of 28,000 M^-1cm^-1 and the other 38,000 M^-1cm^-1. I'm not sure which will better suit primrose anthocyanins, but looking up the references may give you more confidence in choosing one or the other. http://ecsoc2.hcc.ru/DP_TOP3/dp180/dp180.htm http://www.employees.csbsju.edu/ssaupe/biol327/protoplast_antho_conc.htm good luck with your project! derrick
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