Cloning and Expression Analysis of Cysteine Protease Gene CpCP from Papaya Isolation,Subcellular Localization and Expression Analysis of a Citrus Cysteine Protease Gene,CsCysP Isolation,Subcellular Localization and Expression Analysis of a Citrus Cysteine Protease Gene,CsCysP Cloning and Expression Analysis of Cysteine Protease Gene CpCP from Papaya