CKAP4 and diabetic kidney disease: Among these, two of the actin cytoskeleton-related proteins, CKAP4 and Drebrin-1 (DBN1), were highly expressed in the glomeruli as compared to tubules, and their mRNA expression was modestly reduced in the glomeruli of DKD patients according to Nephroseq data sets (nephroseq.org) (Supplementary Fig. 13).