Figure 4. Immunohistochemical assay for (A) PHEK grown on four G/C/P biocomposites at 1, 3 days and for (B) PHDF grown on four biocomposites at 1, 3 days, as the staining controls lacking primary antibody were present in the second set of columns.

CK-14 was a specific protein for PHEK, whereas alpha tubulin was a specific protein for PHDF. w/o, without. (scale bar: 250 µm).