The method of testing a stem cell marker uses the amount of expression and localization of the spleen regeneration factor REG I (including two regenerating gene I gene products α and β. Hereinafter also simply referred to as REG I) as indexes. 膵臓再生因子REG I(Regenerating gene I 遺伝子産物、αおよびβの2個の遺伝子を含む:以下単にREG Iということがある)の発現量と局在を指標とする幹細胞の検査方法。 - 特許庁