Protonophores are compounds that can disrupt the proton gradient across a membrane.

The protonotary is responsible for maintaining court records.

The protonotaries attended the meeting.

The protonemata are the initial stage of moss development.

The protonema is the first stage in the life cycle of a moss.

A protoneutron is a short-lived astronomical object that forms as a result of the collapse of the core of a massive star during a supernova event.

Protoneutron stars are formed during the core-collapse supernova explosion.

A protoneutron star is formed during the core collapse of a massive star.

Protonolysis is a chemical reaction that involves the transfer of a proton from a reactant to a solvent or another reactant.

The compound contains several protonatable functional groups.