passages.id: BioInfer.d582.s0__text
passages.type: Sentence
passages.text: The binding constants of Acanthamoeba profilin to fluorescein-labeled actin from Acanthamoeba and from rabbit skeletal muscle have been determined by measuring the reduction in the actin tracer diffusion coefficients, determined by fluorescence photobleaching recovery, as a function of added profilin concentration.