Keyhole limpet hemocyanin (KLH), II: Characteristic reassociation properties of purified KLH1 and KLH2.

Subunits of the two types of keyhole limpet hemocyanin (KLH1 and KLH2), purified by gel filtration chromatography and preparative polyacrylamide gel electrophoresis from Immucothel, have been used for macromolecular reassociation studies. In-vitro reassociation has been achieved with a standardized system using a Tris-saline stabilizing buffer at pH 7.4 containing 100 mM calcium and magnesium chloride at 4 degrees C. The relatively slow progress of reassociation has been monitored and the varying oligomeric forms of KLH1 and KLH2 produced have been studied by transmission electron microscopy, using specimens negatively stained with 5% ammonium molybdate containing 1% trehalose. Specimens ha…