The tetracycline promoter drives inducible expression along with a ubiquitous CMV of the fluorescent timer protein with the medium mutations (mCherry*M23E, N28D, T48S, K75R, L88W, M155I, Q193L, L204M, Y219C, and R225H) fused to human H2BC9 protein for chromatin localization. (J:289588)