pah (PSI-H) is a conserved subunit of type I Photosystem I (PSI). PSI is a complete membrane polyprotein complex that catalyzes the transfer of electrons from plastocyanin (or cytochrome c6) to ferredoxin (or xanthodoxin). Psa-H is believed to be involved in the regulation of stat1-stat2 transition. In plants and green algae, Psa-H is nucleologically encoded and is translated into the chloroplast and inserted into the thylakoid membrane.
For research use only, not for clinical use.