Q: How to label the N-terminus of a protein selectively?
murphy_r at licre.ludwig.edu.au
Wed Apr 22 00:59:31 EST 1998
You can derivatize the N-terminus of free lysine (i.e. the amino acid itself)
by complexing the e-amino group as a copper salt (check the amino acid
chemistry literature for this), but I don't know if this would work when the
lysine is in a protein....
I don't see any reason, other than accessibility of the e-amino groups, why it
shouldn't work, but maybe someone else has tried this already.
Good luck, I think it's going to be difficult no matter what you try.
In article <353BE08A.69C4AA6B at kali.com.cn>, wenfeng.chen at kali.com.cn (Wen-Feng
>I want to selectively label the N-terminus of a protein with FITC.
>Namely, the e-amino group of Lys should not be labeled during this
>procedure. Up to now, I can not get an appropriate protocol of it. Any
>help from you is extremely appreciated!
>wenfeng.chen at kali.com.cn
Roger Murphy, Ph.D.
Biological Production Facility
Ludwig Institute for Cancer Research
Austin & Repatriation Medical Centre
Heidelberg, Vic. 3084
Email murphy_r at licre.ludwig.edu.au
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