This process is repeated until all the codons in the mRNA have been read by tRNA molecules, and the amino acids attached to the tRNAs have been linked together in the growing polypeptide chain in ...

For example, some polypeptide chains require the addition of other ... create channels through the cell membrane, or carry out one of many other important cellular support functions.

Proteins are composed of one or more chains of amino acids ... Amino acids are joined together by peptide bonds to form polypeptide chains. The sequence of amino acids in a protein, known as its ...