What method did scientists use to identify the kai genes of the cyanobacterial clock?
Group of answer choices
a. Fluorescence microscopy to look at protein movement in the cell
b. Heat maps of the transcriptome from deep sequencing
c. Insertion of a promoterless luciferase gene to see which genes are expressed rhythmically
d. Mutagenesis of a luciferase reporter strain to find altered phenotypes of rhythmic light production