Transglutaminase is an enzyme, not a single molecule with a specific chemical formula. It's a protein, and like all proteins, it's made up of a long chain of amino acids.

Therefore, there's no single chemical formula for transglutaminase. However, there are different types of transglutaminases with distinct amino acid sequences.

If you need to refer to a specific type of transglutaminase, you can use its scientific name, like:

* Tissue transglutaminase (TG2): This is the most common type in humans, and its gene is known as *TGM2*.

* Factor XIII: This is another type of transglutaminase that plays a role in blood clotting.

Remember, the exact amino acid sequence of transglutaminase can vary depending on the organism and its specific function.