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Effect of different islet BMPs on the morphology of dithizone-stained human islets after 4–5 days of culture in hypoxia. Treatment groups are (A) pre-culture, (B) sham-treatment, (C) COL-4, (D) L-521, (E) PLC and (F) the combination of COL-4 plus L-521 plus PLC. All treatment groups were isolated from the same donor pancreas (original magnification × 50).
