Comparison of interactome of Col4a1 and Col4a2 with interactome of Col1a1, a key molecular determinant of pulmonary fibrosis [83], revealed their significant similarity—approximately 77% of partner genes of Col4a1 and Col4a2 retrieved from STRING database were found to be first neighbors of Col1a1 (Figure 7A). The gene discussed is COL4A2; the disease is pulmonary fibrosis.