Photosystem I related antibodies

  Photosystem I (PS I, or plastocyanin-ferredoxin oxidoreductase) is the second photosystem in the photosynthetic light reactions of algae, plants, and some bacteria. Photosystem I (PS I) is an integral membrane protein complex that uses light energy to produce the high energy carriers ATP and NADPH. More than 110 cofactors, significantly more than photosystem II, comprise the PS I system.

Two main subunits of PS I, PsaA and PsaB, are closely related proteins involved in the binding of P700, A0, A1, and Fx. PsaA and PsaB are both integral membrane proteins of 730 to 750 amino acids that seem to contain 11 transmembrane segments. The Fx 4Fe-4S iron-sulphur centre is bound by four cysteines; two of these cysteines are provided by the PsaA protein and the two others by PsaB. The two cysteines in both proteins are proximal and located in a loop between the ninth and tenth transmembrane segments. A leucine zipper motif seems to be present downstream of the cysteines and could contribute to dimerization of psaA/psaB. The terminal electron acceptors, FA and FB, are located in a 9 kDa protein called PsaC.

Until now PhytoAB has more than 300 chloroplast related antibodies, including more than 30 PS I related antibodies. We have PsaA, PsaB, PsaC, PsaD, PsaE, PsaF, PsaG, PsaH, PsaI, PsaK, PsaN,  NdhI, NdhJ, NdhM, NdhN, NdhO, NdhV, YCF3, YCF4, YCF37, PGRL1, PSA2,PGR5 etc. The Western blot shows results of PHY0342/PsaA, PHY0054A/PsaB, PHY0055A/PsaC.

For more question about the Photosystem I antibodies please email us info@phytoab.com.