Effect of dilution on ACE activity in the homogenates of heart chambers.

<p>ACE activity and ZPHL/HHL ratio were measured in the homogenates of human heart chambers at different dilutions using two substrates (as in the legend to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0181976#pone.0181976.g001" target="_blank">Fig 1</a>). Data are expressed as absolute values (<b>A</b>-<b>C</b>) and as % from homogenates at maximal dilution—1/30 (<b>D</b>-<b>F</b>). Each value is a mean of several (2–3) experiments on separate homogenates in duplicates.