a Immunohistochemistry (left) and quantification (right) of Cyclin T1 in the liver isolated from adult R26CMER/+ or heart isolated from Myh6-Cre; R26LSL-CMER/+ mice systemically infected with adeno-associated virus (serotype 9, 1 × 1011 vg/mouse) encoding either RFP (AAV9-RFP, n = 5) or Ccnt1 (AAV9-Ccnt1, n = 4) 4 weeks post infection. Mean and s.e.m shown. Unpaired t-test; AAV9-RFP vs AAV9-Ccnt1: ***P < 0.0001. Representative images based on analysis of five independent mice. b Immunoblot analysis of the C-terminal domain of phosphorylated RNA polymerase II (p-Rpb1(S2)), CDK9 and Cyclin T1 expression in the heart isolated from adult Myh6-Cre; R26LSL-CMER/+ mice systemically infected with adeno-associated virus encoding either RFP (AAV9-RFP) or Ccnt1 (AAV9-Ccnt1) 4 weeks post infection. Replicate samples are derived from independent mice. c Quantitative RT-PCR analysis of Cad, Bzw2, Pinx1, Polr3d, St6 and Cdc25a expression in control (R26LSL-CMER/+; no cre, n = 5) and Myh6-Cre; R26LSL-CMER/+ (R26LSL-CMER/+; cre+, n = 7) adult mouse heart isolated 4 weeks post systemic infection with an adeno-associated virus encoding Ccnt1 (AAV9-Ccnt1) and 4 h post administration of 4-OHT. Expression is relative to the respective wild type (R26LSL-CMER/+). Mean and s.e.m shown. Unpaired t-test; no cre vs cre+: ***P < 0.0005 (Cad, Bzw2, Pinx1 and St6), **P = 0.0013 (Cdc25a), **P = 0.0035 (Polr3d). Replicate samples are derived from independent mice. d Enrichment of common Myc targets (liver, lung, kidney and heart) in cardiomyocytes isolated from the heart of AAV-CCNT1 infected Myh6-cre; R26LSL-CMER/+ (Myc+Cyclin T1) mice in comparison to uninfected Myh6-cre; R26LSL-CMER/+ mice (Myc) at 4 h post administration of 4-OHT, as determined by RNA sequencing. Including normalised enrichment score (NES) and FDR q-value (FDR).