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Protein expression of GIRK1 in six breast cancer cell lines. Top panel: GIRK1 expression was shown at the correct molecular weight (62 kDa) in ZR-75-1 and MDA-MB-453. GIRK1 expression was also seen at a lower molecular weight (40–42 kDa) for ZR-75-1, MDA-MB-361, MCF-7, MDA-MB-468, and MDA-MB-453. Bottom panel: GAPDH protein was detected in all samples.
