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. 2021 Oct 30;12:555. doi: 10.1186/s13287-021-02619-9

Fig. 2.

Fig. 2

Raman spectroscopy and classification analysis for PHH (Lot:005), ProliHHs P1 and P4. a The averaged spectra (n = 1850) collected by PHH (n = 620), P1 (n = 624) and P4 (n = 606) on fingerprint region. b Linear discriminant analysis clearly distinguished three cell groups. (The red, blue, and green colors represent PHH, ProliHHs P1 and P4 cells, respectively. PHH: primary human hepatocytes, ProliHHs: proliferating human hepatocytes, P1: passage 1, P4: passage 4)