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Figure Caption
Fig. 4 Cardiac cushion dynamics during heart contraction. A-D: Single images produced from a four-dimensional reconstruction of the actively contracting 72 hours postfertilization (hpf) Tg(tie2:GFP)-expressing heart. The valve cushions between the atrium (a) and the ventricle (v) and the ventricle and the bulbus arteriosis (ba) are marked with an asterisk and plus sign, respectively. GFP, green fluorescent protein. Scale bar = 50 μm.
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