VISUALIZATION OF CHLOROPLAST 3 DIMENSIONAL ARCHITECTURE BY SEM

我们正在研究叶绿体的结构。光合作用 包含两个组件：“光反应”和“暗”反应。 光反应发生在3-D膜网络(类囊体)上 叶绿体和涉及线性电子传递的几个 蛋白质复合体，最著名的是光系统II(PSII)和I(PSI)。 这两种蛋白质复合体位于不同的区域 类囊体。因此，电子必须在可移动的扩散器上穿梭 电子载体胞浆素(PQ)和血浆蓝蛋白(PC)。这个 PC和PQ的扩散速率是已知的，但不是平均扩散速率 距离，因为类囊体的三维结构是未知的。如果没有 平均扩散距离的值，理论家们在他们的 希望对光合作用的电子转移速率进行数学建模。 将使用扫描电子显微镜图像来推导平均扩散值 两个光系统之间的距离，然后将用于测试 理论模型。

We are studying the architecture of chloroplasts. Photosynthesis contains two components: "light reactions and "dark " reactions. The light reactions occur on a 3-D membrane network (thykaloids) in chloroplasts and involve linear electron transport through several protein complexes, most notably photosystems II (PSII) and I (PSI). These two protein complexes are found in distinct regions of the thylakoid. Therefore, electrons must be shuttled on mobile diffusible electron carriers plastouinonone (PQ) and plasotcyanin (PC). The diffusion rates of PC and PQ are known but not the average diffusional distance because the thykaloid 3-D structure is unknown. Without a value for average diffusional distance, theorists are stymied in their desire to mathematically model photosynthetic electron transfer rates. SEM images will be used to derive values for the average diffusional distance between the two photosystems that will then be used to test theoretical models.