Complex sentence: Larazotide acetate (also known as AT-100) is a synthetic eight amino acid peptide that functions as a tight junction regulator and reverses leaky junctions to their normally closed state.
Split into simpler sentences: Larazotide acetate (also known as AT-100) functions as a tight junction regulator. It is an eight amino acid peptide that functions as a tight junction regulator and reverses leaky junctions to their normally closed state.