Direct binding studies do not support the existence of true alpha-adreno-receptors in rat white fat cells

The complexity of mitochondrial translation products in mouse liver and Ehrlich ascites tumor cells have been studied using a mitoplast system active in ³⁵S methionine incorporation. Electrophoretic analysis on gradient polyacrylamide-SDS gels and urea-SDS gels under highly dissociating conditions show that both of the mitochondrial systems synthesize about 22 polypeptides. Many of these ³⁵S labeled products compare with the polypeptides predicted by the DNA sequence analysis data reported by Anderson $\text{et al.}$ (1).