Glycine, valine, leucine, isoleucine, alanine, they all are aliphatic, so you will not see a ring!
The lone human amino acid with one is proline. From protein we are formed!
With two hydroxyl groups you'll find serine and threonine. For sulfur, look to cysteine or to methionine!
For bases, you have arginine, lysine, and histidine. From protein we are formed! (Now the aromatics!)
Tryptophan and tyrosine and phenylalanine! Aspartic and glutamic are both acids as we've seen.
For amides, see asparagine and also glutamine. From protein we are formed!
