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. Author manuscript; available in PMC: 2013 Feb 11.
Published in final edited form as: Bioorg Med Chem Lett. 2011 Oct 12;21(24):7412–7415. doi: 10.1016/j.bmcl.2011.10.009

Figure 3.

Figure 3

Spermine conjugation increases cellular uptake of the stapled peptides without apparent cytotoxicity analyzed by ATP assay. The CellTiter-Glo reagent (Promega) was used to measure HeLa cell viability after treatment with 10 μM of the unstapled (1 and 5) or the stapled peptides (2-4 and 6-8).