Phytochrome
Absorption Spectra:
PR maxima in red = 666 nm
PFR maxima in far-red = 730 nm
Synthesized in PR form
Ubiquitous
Phytochrome is a chromoprotein
Protein:
homodimer of 2 identical polypeptides (124 kDa)
Chromophore:
open-chain tetrapyrrole
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