Immunofluorescence of human primary myoblasts in culture with GM and DM with or without anti-Syncytin-1 (-/+ Ab) for 4 days and analysis by confocal microscopy for nuclei (Hoechst 33342), F-actin (Phalloidin Alexa488), membrane (wheat germ agglutinin Alexa594) and the merge with all.

<p>Note the multinucleated myofibre in DM. DM composite of 96 z-stacks and GM of 17 z-stacks. Bars = 50μm.</p>