... interact with BiP but differin their affinities for BiPTo determine whether the mammalian ER-residentHsp40s contain a functional J-domain, hybrid proteins 0 500 100 01 500 02 468 0 100 200 30 0 400 A B 00 ,511,522,5microsomes ... Biol Chem 279,11 432 –114 43. 26 Eki T, Naitou M, Hagiwara H, Ozawa M, SasanumaSI, Sasanuma M, Tsuchiya Y, Shibata T, Hanaoka F &Murakami Y (1996) Analysis of a 36 .2 kb DNAsequence including ... ATPGrp1 70 Grp1 70 + BiPfraction numberBiPBiP+ ATP 100 50 0 0 5 10 15 20 fraction number 0 5 10 15 20 Protein (arbitrary units)4 50 30 0 1 50 0Protein (arbitrary units)Fig. 6. Characterization...