Fig. 4From: Investigating and characterizing the binding activity of the immobilized calmodulin to calmodulin-dependent protein kinase I binding domain with atomic force microscopyA partially covered CaM layer on the MUTMS pattern. a Ac mode topography image. b Corresponding phase image. c Histogram corresponding to protein fully covered area in (a). The distance between the two peaks in the histogram specifies the height of the CaM pattern over OTS background in (a)Back to article page