图1. 拟南芥Shaker家族单个亚基和离子通道的拓扑结构(改自Sharma et al., 2013)
(A) 单个亚基拓扑结构; (B) Shaker离子通道的多种不同四聚体组成形式, 包括内向和外向质膜K⁺通道。S1-S6: 单亚基的第1-6个跨膜区; N/C端: 氨/羧基末端; P: 通道孔区; +: 带正电荷的电压感受器结构域; cNBD: 环核苷酸结合域

Figure 1. Topological structure of a representative subunit and tetramers of Shaker family from Arabidopsis (modified from Sharma et al., 2013)
(A) Topological structure of a Shaker subunit; (B) Diverse tetramers of K⁺ channels composed of Shaker members, including inward and outward K⁺ channels. S1-S6: Transmembrane domains 1-6; N/C termini: The amino terminal and carboxyl terminal; P: Pore region; +: With positive charged voltage sensor domain; cNBD: Cyclic nucleotide binding domain.