Is "reaction center" the same as "photosystem"?

Question

I have a diagram which labelled a part of PSI (Photosystem I) as *"reaction center"*. But I have read on several websites that the reaction centers are PSI (the whole complex, not just a part of it) and PSII. So, which one is correct? And if the reaction center is only a part of these PSI and II complexes, what does it contain? And what does it do?

Answer 1

Hi,

The reaction center is part of the entire photosystem and is found within the core complex, which is comprised of multiple proteins that initiate electron transport.

Source:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4030627/