In banana peel, initially, total and soluble PPO were about 110 and 0.7 unit/g fresh weight, respectively, and then were little affected by the ethylene-ripening treatment.

• 在香蕉果皮里；其多酚氧化酶的总活性和可溶性活性最初分别为110、0.；7个活性单位/克鲜重；之后；其活性也几乎均未受乙烯催熟处理所影响。