Proteomic analysis of African-American and Caucasian-American breast extracellular matrix molecules (ECM). (a) Western blot of proteins identified by mass spectrometry with corresponding identified peptides. (b) Datasets of proteins unique to African-American or Caucasian-American ECM grouped according to significant association to canonical pathways. B-H = Benjamini-Hochberg. (c) In silico analysis of proteins: top signaling network of proteins unique to the African-American (left) or Caucasian-American (right) datasets. AA = African-American, CAU = Caucasian-American.