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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: FeLiXe on June 14, 2006, 01:38:03 PM

Title: IR peaks of a protein
Post by: FeLiXe on June 14, 2006, 01:38:03 PM

hi

It seems that IR-spectra of proteins always show two peaks: 1650/cm and 1530/cm (i.e. 4040/inch and 3750/inch  ;D, in case you say it that way ...)

the 1650 peak is for the C=O in the amid. what is the 1530? Is the C-N so much a C=N that it absorbs that far up?

thanks

Title: Re: IR peaks of a protein
Post by: chiralic on June 14, 2006, 04:44:04 PM

It not necesary conver cm to inch in IR Spectroscopy...

Also I attached a pdf file about FTIR and Proteins...

Regards

Chiralic

Title: Re: IR peaks of a protein
Post by: FeLiXe on June 14, 2006, 04:54:26 PM

ok thanks, it seems like that second peak really is the C-N vibration

Title: Re: IR peaks of a protein
Post by: chiralic on June 14, 2006, 05:06:05 PM

Also, I found this info on Internet check out this link:

http://www.imb-jena.de/ImgLibDoc/ftir/IMAGE_FTIR.html.html

Regards,

Chiralic

Title: Re: IR peaks of a protein
Post by: FeLiXe on June 16, 2006, 03:32:52 AM

thanks, that seems pretty cool. I needed a little information to write a protocoll