刘国平的课件-糖酵解.ppt

第十九章糖代谢第二节糖酵解 Louis Pasteur in his laboratory 刘国平 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 一. 糖酵解的概念指葡萄糖通过一系列步骤,降解成三碳化合物(***酸)的过程。糖酵解途径又称 EMP 途径(Embden-Meyerhof Parnas pathway) 定义定义 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 一. 糖酵解的概念糖酵解是指细胞在细胞质中分解葡萄糖生成***酸的过程,此过程中伴有少量 ATP 的生成。这一过程是在细胞质中进行,不需要氧气,每一反应步骤基本都由特异的酶催化。在缺氧条件下***酸被还原为乳酸,有氧条件下***酸可进一步氧化分解生成乙酰 CoA 进入三羧酸循环,生成 CO2 和H2O 。定义定义 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 二. 糖酵解的过程第一步:葡萄糖的磷酸化第一阶段激酶:催化将 ATP 上的磷酸基团转移到受体上的酶。激酶都需要 Mg 2+作为辅助因子。 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 二. 糖酵解的过程第一步:葡萄糖的磷酸化第一阶段 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 二. 糖酵解的过程第二步: 6-磷酸果糖的生成第一阶段 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 二. 糖酵解的过程第二步: 6-磷酸果糖的生成第一阶段 Evaluation only. Evaluation only. Created with Client Profile . Created with Client