A transfer RNA with a UGU anticodon is enzymatically conjugated to $^{14} \mathrm{C}$ -labeled cysteine. The cysteine unit is then chemically modified to alanine (with the use of Raney nickel, which removes the sulfur atom of cysteine). The altered aminoacyl-tRNA is added to a protein-synthesizing system containing normal components except for this tRNA. The mRNA added to this mixture contains the following sequence:
5'-UUUUGCCAUGUUUGUGCU-3'
What is the sequence of the corresponding radiolabeled peptide?