Proteins are the building blocks of our bodies, including enzymes, hormones, antibodies, transport molecules like the hemoglobin that carries oxygen to our cells, structural proteins like collagen and keratin, and the fibers that make our muscles move. We learned about the twenty amino acids directly coded by our DNA that make up the proteins in our bodies.
We played "Memory" with amino acids cards...
built four-residue peptide chains with molecular models...
and learned how to recognize the side chain that makes each amino acid unique.