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Figure 4 | Nanoscale Res Lett

Figure 4

From: Atomic Force Microscopy Study of Protein–Protein Interactions in the Cytochrome CYP11A1 (P450scc)-Containing Steroid Hydroxylase System

Figure 4

AFM images of the objects (a) and the corresponding density of distribution with height (ρ( h ) Ad + CYP11A1 ) for Ad + CYP11A1 mixture (b); comparison of ρ( h )Ad + CYP11A1 vs. normalized distribution densities of individual Ad and CYP11A1 monomers (summarized area under ρ( h )Ad and ρ( h )CYP11A1 curves is reduced to 100%) (c); differential curve (Δρ) between ρ( h )Ad + CYP11A1 and the sum of normalized distribution densities of individual Ad and CYP11A1 (d). Tapping mode. Experimental conditions were as follows: the mixture of 5 μM solutions (10 μl each) of appropriate individual proteins (monomeric CYP11A1, containing 1% Emulgen 913, and Ad) in 50 mM KP, pH 7.4, was incubated for 10 min, diluted 2.5 times with the same buffer, and a 5-μl portion of the mixture was immediately placed onto mica, T = 25°C.

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