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. 2020 May 11;12(5):443. doi: 10.3390/pharmaceutics12050443

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) Fluorescent microscopic images of HeLa cells treated with biotin + PG4.5-DETA-biotin and PG4.5-DETA-biotin for 2 h or 6 h (scale bar = 20 µm). (B) Flow cytometry analysis of the cellular uptake efficiency in HeLa cells treated with PBS as control, biotin + PG4.5-DETA-biotin/GEM and PG4.5-DETA-biotin/GEM for 6 h.

(A) Fluorescent microscopic images of HeLa cells treated with biotin + PG4.5-DETA-biotin and PG4.5-DETA-biotin for 2 h or 6 h (scale bar = 20 µm). (B) Flow cytometry analysis of the cellular uptake efficiency in HeLa cells treated with PBS as control, biotin + PG4.5-DETA-biotin/GEM and PG4.5-DETA-biotin/GEM for 6 h.