2.1.1.278 S-adenosyl-L-methionine + (indol-3-yl)acetate - 2.1.1.278 S-adenosyl-L-methionine + (indol-3-yl)acetate highest activity 2.1.1.278 S-adenosyl-L-methionine + (indol-3-yl)acetate the enzyme is found in plants and is important for regulation of the plant hormone (indol-3-yl)acetate. The product, methyl (indol-3-yl)acetate is inactive as hormone 2.1.1.278 S-adenosyl-L-methionine + (indol-3-yl)acetate the enzyme modulates homeostasis of (indol-3-yl)acetate in plant tissues through methylation of the free carboxyl group of (indol-3-yl)acetate 2.1.1.278 S-adenosyl-L-methionine + indole-3-acetate - 2.1.1.278 S-adenosyl-L-methionine + indole-3-acetic acid -