Fig. 4From: Significances of viable synergistic autophagy-associated cathepsin B and cathepsin D (CTSB/CTSD) as potential biomarkers for sudden cardiac deathThe protein–protein interaction (PPI) network, module analysis, and hub genes selection. a, b Results of subnet module analysis of the PPI network. c Hierarchical clustering of differentially expressed genes in lysosomal pathways, red represents up-regulated genes and staining represents down-regulated genes. d Gene–gene interaction network among cathepsin family membersBack to article page