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appressed membrane within chloroplasts

BabcockHall
in Biochemistry and Molecular Biology

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I have been reading Cox and Nelson's Principles of Biochemistry, 6th ed., Chapter 19.  I have some questions about the two regions of the thylakoid membrane. In one portion of the chapter, then refer to the stacks as grana and the non stacked regions as stromal lamellae.  They seem to use appressed membranes synonymously with grana and nonappressed membranes synonymously with stromal lamellae.  It also looks as if the phosphorylation of LHC-II-OH (light harvesting complex II) causes it to un-appress the membrane nearby, and when LHC-II-OPO32- is dephosphorylated, the surrounding membrane is appressed again.  Is this correct?  Are there any subtleties in the language I should know about?

Edited by BabcockHall
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