26.1 Introduction Figure 26.2 Three means for transferring material of various sizes into the cell are provided by ion channels,receptor- mediated ligand lors enter through channel released transport,and receptor internalization. Coated vesicle is endocytosed 情華大当
Figure 26.2 Three means for transferring material of various sizes into the cell are provided by ion channels, receptormediated ligand transport, and receptor internalization. 26.1 Introduction
Act片gk6as色 26.1 Introduction Figure 26.3 A signal may be transduced by activating the kinase activity of the cytoplasmic domain of a transmembrane receptor 3906606066060668 or by dissociating a G protein into subunits that act on target proteins on Phosphorylated receptor G protein dissociates, the membrane associates with target protein actie subunit(s)act on target 清菜大当
Figure 26.3 A signal may be transduced by activating the kinase activity of the cytoplasmic domain of a transmembrane receptor or by dissociating a G protein into subunits that act on target proteins on the membrane. 26.1 Introduction
Camier Channel 26.2 Carriers and channels EXTRACELLULAR Solute binds Gate is form water soluble paths to carrier closed through the membrane CYTOSOL Figure 26.4 A carrier(porter) transports a solute into the cell by 82 a conformational change that EXTRACELLULAR brings the solute-binding site from the exterior to the interior,while an ion channel is controlled by the opening of a gate (which might in principle be located on either side Solute exposed Gate opens;ions of the membrane) to cytosol travel through CYTOSOL 情菜大当
Figure 26.4 A carrier (porter) transports a solute into the cell by a conformational change that brings the solute-binding site from the exterior to the interior, while an ion channel is controlled by the opening of a gate (which might in principle be located on either side of the membrane). 26.2 Carriers and channels form water soluble paths through the membrane
Camier Channel 26.2 Carriers and channels EXTRACELLULAR Solute binds Gate is form water soluble paths to carrier closed through the membrane CYTOSOL Figure 26.4 A carrier(porter) transports a solute into the cell by 8赞 a conformational change that EXTRACELLULAR brings the solute-binding site from the exterior to the interior,while an 6 ion channel is controlled by the opening of a gate (which might in principle be located on either side Solute exposed Gate opens;ions of the membrane). to cytosol travel through CYTOSOL 清菜大兰
Figure 26.4 A carrier (porter) transports a solute into the cell by a conformational change that brings the solute-binding site from the exterior to the interior, while an ion channel is controlled by the opening of a gate (which might in principle be located on either side of the membrane). 26.2 Carriers and channels form water soluble paths through the membrane
26.2 Carriers and channels form water soluble paths through the membrane Charged face of helix Hydrophobic face of helix Figure 26.5 A channel may be created by amphipathic helices,which present their hydrophobic faces to the lipid bilayer,while juxtaposing their charged faces away from the bilayer.In this example,the channel is lined with positive charges,which would encourage the passage of anions. 清菜大当
Figure 26.5 A channel may be created by amphipathic helices, which present their hydrophobic faces to the lipid bilayer, while juxtaposing their charged faces away from the bilayer. In this example, the channel is lined with positive charges, which would encourage the passage of anions. 26.2 Carriers and channels form water soluble paths through the membrane