Variables: concentration Substances: 5-Fluoro Cytosine (XRECTZIEBJDKEO-UHFFFAOYSA-N) 3-5-Diiodo-L-tyrosine (NYPYHUZRZVSYKL-ZETCQYMHSA-N) 6-benzyladenine (NWBJYWHLCVSVIJ-UHFFFAOYSA-N)