There are several amino acids that are found only in bacteria and not in plants or animals. These include:

1. Diaminopimelic acid (DAP): DAP is an essential amino acid found in the cell walls of most bacteria. It is a precursor for the synthesis of peptidoglycan, a major component of bacterial cell walls.

2. Meso-diaminopimelic acid (meso-DAP): Similar to DAP, meso-DAP is also found in the cell walls of certain bacteria. It is a structural component of peptidoglycan and is particularly abundant in Gram-negative bacteria.

3. Aminoethylcysteine (AEC): AEC is a non-proteinogenic amino acid that is found in some bacteria. It is derived from cysteine and is involved in the biosynthesis of thiopeptide antibiotics.

4. Dihydrodipicolinic acid (DHDPA): DHDPA is an important intermediate in the biosynthesis of lysine in bacteria. It is found primarily in Gram-positive bacteria and is not present in plants or animals.

5. Methylthioadenosine (MTA): MTA is a sulfur-containing amino acid that is found in bacteria and some plants. It is involved in various metabolic processes, including the recycling of sulfur-containing compounds.

These are just a few examples of amino acids that are unique to bacteria. There may be others that have not yet been discovered or extensively studied.

Answer is 4 opotion that is diaminoplamic acid