when microsomal membranes containing known amounts and composition of spin-labelled radioactive lipids were incubated with unlabelled mitochondrial membranes , reisolated mitochondria contained spin- and radioactive-lipids in an amount which could not be accounted for by the microsomal contamination of reisolated mitochondria , establishing therefore the translocation of labelled lipids from microsomal to mitochondrial membranes .
C0026237
mitochondria
C0596952
mitochondrial membranes