Sweetness is often connected to aldehydes and ketones, which contain a carbonyl group.
From the en.wikipedia.org
Likewise, a thiacyclol is formed by adding an SH thiol moiety to a peptidyl carbonyl group.
From the en.wikipedia.org
In acids, the carbonyl group becomes protonated, and this leads to a much easier nucleophilic attack.
From the en.wikipedia.org
By analogy, an oxacyclol is formed when an OH hydroxyl group is added to a peptidyl carbonyl group.
From the en.wikipedia.org
Nucleophilic addition to a carbonyl group.
From the nature.com
Each molecule also forms two instances of a second type of hydrogen bond from a urea N-H to the urea carbonyl group on an adjacent molecule.
From the nature.com
The problem is, over time cytosine deaminization can occur-where a cytosine loses its amine group, which is replaced by a carbonyl group.
From the en.wikipedia.org
The molecule, of a type known as an alkenone, is a chain with 37 carbon atoms, several of which are joined by double bonds, and a carbonyl group.
From the newscientist.com
The terms urea and carbamide are also used for a class of chemical compounds sharing the same functional group RR'N-CO-NRR', namely a carbonyl group attached to two organic amine residues.