FABP4 and triple-negative breast carcinoma: In addition, to exclude the possibility that anti-FABP7 may react with some close homologues from the FABP protein family [27], we performed 2D–WB with protein extracts from several triple-negative breast cancer samples in which we had previously observed aberrant expression of three other FABP protein family members, namely, FABP3, FABP4 and FABP5 [23].