Definition

A type of protein that forms channels in cell membranes, allowing small molecules to pass through.

Example

Porins are essential for the transport of nutrients and waste in and out of cells.

Conversation

I just learned about porin proteins in my biology class.

Oh really? What do they do exactly?

They help small molecules diffuse through cellular membranes, which is pretty fascinating.

That sounds cool! I love how much there is to learn about cellular biology.

Synonyms & Antonyms

Root Explanation

The word 'porin' originates from the Greek word 'poros' (meaning passage or pore) combined with the suffix '-in' (often used in chemistry to denote substances). Thus, 'porin' refers to a type of protein that forms pores in cell membranes, allowing the passage of molecules.

Memory Tip

Think of 'poros' meaning a 'passage' or 'pore' — this helps you remember that 'porin' is a protein that creates passages in cell membranes.

Visually Confused Words