METHOD FOR PRODUCING SOLUBLE THROMBOMODULIN OF HIGH PURITY

摘要

It is intended to obtain soluble thrombomodulin which substantially contains no soluble thrombomodulin variant that can be formed under an acidic condition. According to the invention, a method for producing soluble thrombomodulin which substantially contains no soluble thrombomodulin variant from a soluble thrombomodulin-containing material which contains or is suspected to contain a soluble thrombomodulin variant that can be formed under an acidic condition, comprising the steps of: subjecting the soluble thrombomodulin-containing material to an anion exchanger or hydroxyapatite; and obtaining an eluted fraction containing soluble thrombomodulin which substantially contains no soluble thrombomodulin variant by applying a linear or stepwise gradient of salt concentration or a combination of linear and stepwise gradients thereof under a separation condition capable of separating the soluble thrombomodulin variant and performing identification in advance or while performing identification is provided.