||Yewdell JW, Reits E, Neefjes J. Making sense of mass destruction: quantitating MHC class I antigen presentation. Nat Rev Immunol. 2003 Dec3(12):952-61. DOI: 10.1038/nri1250 p.957 figure 4PubMed ID14647477
|| Reits, E. et al. Peptide diffusion, protection, and degradation in nuclear and cytoplasmic compartments before antigen presentation by MHC class I. Immunity 18, 97–108 (2003)  Princiotta, M. F. et al. Quantitating protein synthesis, degradation, and endogenous antigen processing. Immunity 18, 343–354 (2003).PubMed ID12530979, 12648452
||Primary source  abstract: "[Investigators] have visualized the fate and dynamics of intracellular peptides in living cells." Primary source  abstract: "Using L929 cells [mouse], [investigators] quantitated the macroeconomics of protein synthesis and degradation and the microeconomics of producing MHC class I associated peptides from viral translation products."
||P.959 left column bottom paragraph: "Using a substrate targeted for rapid and complete destruction, the efficiency of antigen processing was found to be one complex generated per 2,000 proteins degraded (Figs 3 and 4). This low efficiency does not seem to be a peculiarity of L929 cells, as professional APCs (bone-marrow-derived dendritic cells and peritoneal macrophages) were equally efficient at peptide generation [primary source 66]." See caption beneath figure