Trophoblasts. Fluorescence deconvolution micrograph with GFP (green fluorescent protein) and PLAC1 (placenta-specific protein 1) tags used to highlight proteins in differentiating trophoblast cells. Trophoblasts are the first cells to differentiate from a fertilised egg (ovum), forming the outer layer of the blastocyst, an early stage of embryo formation. The trophoblast layer eventually forms the placenta. Cell nuclei (blue) have been highlighted with a DAPI stain.
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