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Fig. 3 Excess RA signaling independently affects atrial and ventricular cell number. A-C: Lateral views of hearts at 48 hpf; red and green outlines indicate ventricle and atrium, respectively. D-F: Frontal views of Tg(cmlc2:DsRed2-nuc) (Mably et al.,[2003]) hearts, displaying nuclear DsRed in all cardiomyocytes, with Amhc immunofluorescence (green). G: Mean (±SD) number of atrial and ventricular cardiomyocytes. WT, n = 22; LA, n = 45; MA, n = 26. H: Fold difference of the means in G. Asterisks, statistically significant differences from WT (P < 0.005, Student's t-test).
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