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Colorectal cancer xenograft COX-1 and COX-2 expression. Tumor lysates from HCA-7 or HCT-116 xenografts were resolved via SDS-PAGE. Proteins were transferred to membranes and then blotted with either COX-1- or COX-2-specific antisera. Fifty micrograms of MC-26 (+) cell lysates served as COX-1-positive controls.
