Structure and classification
The building blocks of proteins. There are 20 standard amino acids in human proteins.
Nonpolar: Gly, Ala, Val, Leu, Ile, Met, Pro, Phe, Trp
Polar uncharged: Ser, Thr, Cys, Tyr, Asn, Gln
Acidic: Asp, Glu
Basic: Lys, Arg, His