生物大分子波谱学原理 吴委辉 Strategy for Assigning Spin Systems of Peptides/Proteins using 2D TOCSY and 2D DOF-COSY Methods use TOCSY to group all protons within a spin system then use COSY to "order"the protons within the group: 兰 兰 9 尘 坐 -N-Ca-C- 至 Cg Hg HN Ha Hg Hb HN Ha Hg Hb 2D long-mix TOCSY 2D DQF-COSY 生物大分子波谱学原理 吴季辉