deaminate

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To remove an amino group, NH₂, from (an organic compound).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb organic chemistry, biochemistry To remove an amino group from a compound, especially by the use of a deaminase enzyme.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb remove the amino radical (usually by hydrolysis) from an amino compound; to perform deamination