"Salmonella" encodes a LuxR homolog, SdiA, but does not encode an AHL synthase. The gene normally encodes a cytoplasmic protein known as merlin. The mRNA encodes RNA dependent RNA polymerase. Another proposed cause is mutations to the DAX1 gene which encodes a nuclear hormone receptor. This is caused by mutations in the dystrophin gene, which encodes the protein dystrophin. Dicistronic or bicistronic mRNA encodes only two proteins. This condition is due to mutations in the CYP19A1 gene which encodes aromatase. CAG encodes for the amino acid glutamine. The first plant genome sequenced was that of "Arabidopsis thaliana" which encodes about 25,500 genes. The process used CRISPR to knock out a gene that encodes polyphenol oxidase. The gene "TCS1" encodes caffeine synthase. The "cya" gene encodes adenylate cyclase, which produces cAMP. The sequence of their monomers effectively encodes information. This problem can be overcome by introducing mutations in the gene that encodes Klenow. It is the sequence of these four nucleobases along the backbone that encodes genetic information.