Protein was isolated from tissue lysates and total protein was quantified. Equal amount of protein were loaded on SDS gels for Western blotting. Proteins of interest are probed with a housekeeping gene using IR dyes. Blots are scanned and quantified using the Licor scanner. In this example, monkey retinoid and choroid tissues were analyzed. We have experience with a range of tissues, including brain, skin, kidney, liver, and more.