... antibodiesagainst KAVKKDEL, KSEKKDEL or KXXXXXKDEL,which recognize the ER retention signal KDEL and bind tovarious ER-resident proteins, were obtained from S. Fuller(EMBL, Heidelberg, Germany). ... fractions was determined bythe method of Lowry et al. [45]. Galactosyltransferase wasassayed as described by Beaufay et al. [46]. Acid phospha-tase was assayed as described by Trouet [47]. Nitrocellulosemembranes ... Chauvet G, Tahiri K, Authier F & Desbuquois B(1998) Endosome–lysosome transfer of insulin andglucagon in a liver cell-free system. Eur J Biochem 254,527–537.53 Authier F & Chauvet...