(A). Immunofluorescence images showing localization of CENP-A (left) and
CENP-C (right) in mouse C2C12 cells that are either growing in culture
(undifferentiated myoblasts) or were differentiated by serum starvation to form
multi-nucleated muscle myotubes. Phalloidin staining is a marker for myotubes.
Arrows indicate myotubule nuclei in the CENP-C experiments, whereas the other
nuclei with CENP-C staining represents a quiescent, undifferentiated cell. Scale
bar = 10 μm. (B) Quantification of CENP-A and CENP-C fluorescent
intensity in either undifferentiated C2C12 cells or following myotube formation.
(C) Immunofluorescence images of hepatocytes in post-natal day 0 or 8-week adult
liver, showing CENP-A levels in vivo. Scale bar = 10 μm. Quantification
of CENP-A fluorescence in hepatocytes normalized to ploidy as described in
Experimental Procedures. Error bars represent the mean and standard deviation of
N=40 post-natal hepatocytes, and N=41 adult hepatocytes. (D) Immunofluorescence
images of cardiomyocytes in post-natal day 0 or 8-week adult heart, showing
CENP-A levels in vivo. Scale bar = 10 μm. Quantification of CENP-A
fluorescence in cardiomyocytes, where error bars represent the mean and standard
deviation of N=40 post-natal cells, and N=33 adult cells. ****p<0.0001 by
Mann Whitney test.