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. 2021 Feb 5;9:599631. doi: 10.3389/fchem.2021.599631

FIGURE 7.

FIGURE 7

Qualitative and quantitative assessment of biotin in the PPy coating over 14 days. Fluorescent images show Alexa Fluor™ 350 conjugated streptavidin bonded to available biotin in the PPy coating after (A) 0 (B) 7, and (C) 14 days of incubation in phosphate buffered saline at 37 °C (D) The fraction of fiber area that was fluorescent was quantified over the 14 days observation period and indicated no significant change over time (p = 0.428).