Here's a breakdown of the amino acids coded for by the given codons:

* AGU: This codon codes for Serine (Ser).

* GGG: This codon codes for Glycine (Gly).

* CCU: This codon codes for Proline (Pro).

* GUG: This codon usually codes for Valine (Val), but it can also act as a start codon initiating protein synthesis.

Important Note: The genetic code is slightly different in mitochondria. In some mitochondrial genetic codes, GUG can code for methionine (Met) instead of Valine.