Non-polar amino acid

Non-polar amino acids are those which have no overall charge. Of the twenty amno acids there are five charged and fifteen uncharged, these are:

(A) Alanine

(C) Cystein

(F) Phenylalanine

(G Glycine

(I) Isoleucine

(L) Leucine

(M) Methionine

(N) Asparagine

(P) Proline

(Q) Glutamine

(S) Serine

(T) Threonine

(V) Valine

(W) Tryptophan

(Y) Tyrosine

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The overall charge of an amino acid is determined by the R group attached to the alpha carbon atom. Those with a carboxyl R group will have an overall negative charge, whereas those with a amide group have an positive charge.  .

References

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