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 (rā-sē′mĭk, -sĕm′ĭk, rə-)
Of or relating to a chemical mixture that contains equal quantities of dextrorotatory and levorotatory forms of a compound and therefore does not rotate the plane of incident polarized light.


(rəˈsiːmɪk; -ˈsɛm-) or


(Chemistry) chem of, concerned with, or being a mixture of equal amounts of enantiomers and consequently having no optical activity
[C19: from raceme (as in racemic acid) + -ic]
racemism n


(reɪˈsi mɪk, -ˈsɛm ɪk, rə-)

noting or pertaining to any of various organic compounds that are optically inactive but separable into dextrorotatory and levorotatory forms.
References in periodicals archive ?
During the process of submerged fermentations, L-glutamic acids are largely racemized to D-glutamic acids.
Residues such as Asp, Ser, Cys, Glu, Phe, Asn, and Thr are racemized at a faster rate than other amino acid residues due to the higher electron withdrawing power of the peptide chain and the higher hydroxyl concentration; however, racemization rate is reported to be independent of protein concentration [36].
According to Wehmiller, however, the researchers are most interested in this immunological method to ensure that another biochemical dating technique -- based on measuring the number of left-handed forms of amino acids that have racemized or changed to the right-hand structure over time -- is providing consistent results.