<biochemistry> An amino acid with an imidazole side chain with a pKa of 6-7. Acts as a proton donor or acceptor and has high potential reactivity and diversity of chemical function. Forms part of the catalytic site of many enzymes.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
|Bookmark with:||word visualiser||Go and visit our forums|