I want to know what the extinction coefficients of oxymyoglobin and ferryl myoglobin are. I was able to find the one for the oxymyoglobin in this pretty old article (it says that it equals $121 \text{mM}^{-1}\text{cm}^{-1}$), but I couldn't locate any other reference supporting this claim. Furthermore, I couldn't find any reference in the case of ferryl myoglobin.

I am also curious if, in general, there are tables containing the extinction coeffcients of various compounds (at different wavelengths).

  • $\begingroup$ Which organism are you interested in? They will be very similar among mammals, but not identical. Also, for which wavelength do you want to know it? $\endgroup$
    – Karsten
    Commented Mar 20, 2023 at 21:26
  • $\begingroup$ @Karsten I am interested in horse heart Mb and I want to know it for the absorption maximum, so somewhere around 410-425 nm for the Soret band. $\endgroup$ Commented Mar 20, 2023 at 21:33
  • $\begingroup$ Which pH are you interested in? $\endgroup$
    – Karsten
    Commented Mar 20, 2023 at 22:16
  • $\begingroup$ @Karsten I am interested in pH 9. $\endgroup$ Commented Mar 20, 2023 at 22:44


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