An important organic molecule that may contain the -NH2 group is amino acids.

Here's why:

* -NH2 is the amino group: The -NH2 group is called the amino group.

* Amino acids are the building blocks of proteins: Amino acids are the monomers that link together to form proteins.

* Every amino acid has an amino group: A defining characteristic of amino acids is the presence of both an amino group (-NH2) and a carboxyl group (-COOH).

Example:

Glycine, the simplest amino acid, has the following structure:

H

|

H-N-C-COOH

|

H

The -NH2 group is highlighted.

Let me know if you'd like more examples or want to explore other organic molecules with -NH2!