Figure S3 from Regulation of valve interstitial cell homeostasis by mechanical deformation: implications for heart valve disease and surgical repair AyoubSalma LeeChung-Hao DriesbaughKathryn H. AnselmoWanda HughesConnor T. FerrariGiovanni GormanRobert C. GormanJoseph H. S. SacksMichael 2017 Positive control of the CD31 stain on an unaltered MVAL. Increased CD31 expression in the outer layers suggests the presence of an endothelial cell layer in the intact (unaltered) leaflet.