Internal Parts
Within the inner membrane, in the region called the stroma, there is a system of interconnecting flattened membrane compartments, called the thylakoids. These are the sites of light absorption and ATP synthesis, and contain many proteins, including those involved in the electron transport chain. Photosenthetics pigments such as chlorophylls a,b and c some others e.g. xanthophylls, carotenoids, phycobilins are also embedded within the granum membrane. With exception of chlorophyll a, all the other associated pigments are "accessory" and transfer energy to the reaction centers, Photosytems I and II.
Read more about this topic: Chloroplast Membrane
Famous quotes containing the words internal and/or parts:
“A State, in idea, is the opposite of a Church. A State regards classes, and not individuals; and it estimates classes, not by internal merit, but external accidents, as property, birth, etc. But a church does the reverse of this, and disregards all external accidents, and looks at men as individual persons, allowing no gradations of ranks, but such as greater or less wisdom, learning, and holiness ought to confer. A Church is, therefore, in idea, the only pure democracy.”
—Samuel Taylor Coleridge (1772–1834)
“still a betrayal room for the till-death-do-us
and yet a death, as in the unlocking of scissors
that makes the now separate parts useless,
even to cut each other up as we did yearly
under the crayoned-in sun.”
—Anne Sexton (1928–1974)