Fig. 3

Raman spectra of lipochromes in the cytoplasm of the MSC-derived hepatocytes. The Raman spectra of a undifferentiated MSCs, b MSC-derived hepatocytes (1, lipochrome; 2, nonlipochrome cytoplasm), and c primary hepatocytes (1, lipochrome; 2, nonlipochrome cytoplasm) were investigated in 400–3000 cm^–1. d Raman spectra of the lipochromes with different sizes (1-6) in the cytoplasm of the primary hepatocytes. The number in parentheses indicates the diameter of lipochromes. The black arrows indicate the position of laser excitation and the circle with the dotted line indicates the nucleus. Scale bars = 20 μm