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Fig. 3. Ventricular and atrial endocardial progenitors are intermingled at 40%
epiboly. The fate map of endocardial chamber progenitors is depicted as
described for the myocardial fate map (Fig.
2B). In this map, bar colors correspond to the endocardial
contribution of labeled cells: red, contribution to ventricular endocardium;
yellow, contribution to atrial endocardium; cyan, contribution to both
ventricular and atrial endocardium; black, no endocardial progeny. All data
from Table 2, except for the
experiment labeling five blastomeres, are included. Endocardial progenitors
are found 55-140° from dorsal in all four tiers.
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