Preliminary studies have been made on the subcellular components of the livers of animals given radioactive glucosamine. Microsomes, lysosomes and mitochrondia are strongly labelled.Preliminary studies have been made of the degradation rate of serum protein labelled with C-14-g1ucosamine in rats bearing the Walker 256 tumor. A faster degradation rate of total serum protein labelled by these means was present in the tumour-bearing animals. A faster rate was