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Aged islets have increased nuclear p27KIP1 protein levels as compared to young islets by immunofluorescence assay. (A-B) p27KIP1 nuclear protein levels are significantly increased in aged islets as measured by immunofluorescence. n = 3–5 mice per age, minimum of three sections per rat. **p < 0.01. All images have a set scale bar of 100 nm
