title: Measurement of the binding of human colipase to human lipase and lipase substrates.
abstract: Equilibrium partition in an aqueous two-phase system was the method used for quantitative determinations of the binding between human colipase and human lipase and three triacylglycerol substrates: Intralipid tributyrin and triolein. The measurements were performed in a dextran/polyethyleneglycol system at pH 7.0 in the presence of 2 mM sodium taurodeoxycholate and 150 mM NaCL. The binding of colipase to lipase had a dissociation constant Kd = 4.8 . 10(-8) M. The dissociation constants for the binding of colipase to Intralipid, tributyrin and triolein were found to be 2.10(-7) M, 4.8 . 10(-8) M and 6.2 . 10(-8) M, respectively.
mesh_terms: D003089:Colipases / Q000378:metabolism*; D006801:Humans; D007700:Kinetics; D008049:Lipase / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism*; D014280:Triglycerides / Q000378:metabolism*; D014304:Triolein / Q000378:metabolism
chemical_list: D003089:Colipases; D011506:Proteins; D014280:Triglycerides; D014304:Triolein; D008049:Lipase; C005830:tributyrin