Radioactive amino acid The filter-binding assay Trinucleotide for detecting the binding Ribosome of a trinucleotide to a Filter specific aminoacyl-trNA molecule about 50 codons were assigned by L this simple and elegant method valThe filter-binding assay for detecting the binding of a trinucleotide to a specific aminoacyl-tRNA molecule: about 50 codons were assigned by this simple and elegant method