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Bright field (left column) and fluorescence microscopic image (right column) of gene expression cultured on LbL film 1 (A), LbL film 2 (B), and culture plate as the control group (C) by HEK293 cells (a left and b left) and MC3T3 cells (a right and b right). Magnification is 10× for all images. Scale bar is 400 μm.
Abbreviation: LbL, layer-by-layer.
