1-Aminocyclopropane-1-carboxylic acid

[2][verification needed] Like glycine, but unlike most α-amino acids, ACC is not chiral.

[5] ACC also exhibits ethylene-independent signaling that plays a critical role in pollination and seed production by activating proteins similar to those involved in nervous system responses in humans and animals.

Additionally, ACC activates Ca2+-containing ion currents via glutamate receptor-like (GLR) channels in root protoplasts.

[6] ACC can be used by soil microorganisms (both bacteria and fungi) as a source of nitrogen and carbon.

[7] As such, using ACC to incubate soils has been proven to induce the gene abundance encoding ACC-deaminases, which may have positive consequences on plant growth and stress tolerance.