page_title: Thylakoid
section_title: Structure
hierarchical_section_title: Thylakoid / Structure
caption_attribution_description: English: 10-nm-thick STEM tomographic slice from a lettuce chloroplast. Grana stacks are interconnected by unstacked stromal thylakoids, called “stroma lamellae”. Scalebar = 200 nm. See &#91;1&#93;.
context_page_description: Thylakoids are membrane-bound compartments inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis. Thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen. Chloroplast thylakoids frequently form stacks of disks referred to as grana. Grana are connected by intergranal/ stroma thylakoids, which join granum stacks together as a single functional compartment.
context_section_description: Thylakoids are membrane-bound structures embedded in the chloroplast stroma. A stack of thylakoids is called a granum and resembles a stack of coins.
caption: Scanning transmission electron microscope (STEM) imaging of thylakoid membranes 10-nm-thick STEM tomographic slice from a lettuce chloroplast. Grana stacks are interconnected by unstacked stromal thylakoids, called “stroma lamellae”. Scalebar = 200 nm. See [2].
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