Unlike the ribosome, which can make an arbitrary sequence of peptides, an NRPS can only make one peptide sequence, although as a class, NRPS can make a wider diversity of peptides than can ribosomes.
An NRPS can only make one peptide sequence. This is unlike the ribosome. NRPS can make a wider diversity of peptides than can ribosomes. This is as a class. The ribosome can make an arbitrary sequence of peptides.