What protein can hydrogen ions flow through?

Hydrogen ions can flow through specific proteins known as proton channels or proton pumps. One well-known example is the ATP synthase enzyme, which facilitates the movement of protons across the mitochondrial membrane, generating ATP in the process. Additionally, the voltage-gated proton channel (Hv1) allows protons to flow across cell membranes, contributing to various physiological processes. These proteins play crucial roles in cellular energy production and pH regulation.