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Fig. 3. PGCs from Oct4-positive cell cluster in isolated extra-embryonic mesoderm
at E6.75. (A-G) Time-lapse analysis of Oct4-GFP extra-embryonic mesoderm.
(A-E,G) Images of cells expressing Oct4-GFP in extra-embryonic mesoderm on an
STO feeder layer after (A) 0, (B) 12, (C) 15, (D) 30, (E) 36 and (G) 40 hours
in culture. (F) ALP expression of explant in G. Arrowheads indicate ALP- and
GFP-positive migrating PGCs. (H,I,J) Co-expression of PGC markers, (H) ALP,
(I) PGC7 and (J) Oct4-GFP in PGCs (arrowheads) that developed from cultured
E6.75 extra-embryonic mesoderm. Scale bar: 200 µm (A-G) and 100 µm
(H-J).