Purification of thyroid lysosomes by colloidal silica density gradient centrifugation.

Abstract

A procedure was devised for fractionating crude thyroid lysosomal particles (P750-15,000) by self-forming density gradient centrifugation with colloidal silica. Two discrete particle-containing peaks were observed, based on 131I-labeling and acid phosphatase activity: a heavy peak (density, 1.11-1.12) and a light peak (density, 1.05). Ultrastructural… (More)

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