Oryza sativa PSK gene encodes a precursor of phytosulfokine-alpha, a sulfated peptide growth factor found in plants.

@article{Yang1999OryzaSP,
  title={Oryza sativa PSK gene encodes a precursor of phytosulfokine-alpha, a sulfated peptide growth factor found in plants.},
  author={Hong Yang and Yoshikatsu Matsubayashi and Kenzo Nakamura and Y. Sakagami},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1999},
  volume={96 23},
  pages={13560-5}
}
Phytosulfokine-alpha [PSK-alpha, Tyr(SO(3)H)-Ile-Tyr(SO(3)H)-Thr-Gln], a sulfated mitogenic peptide found in plants, strongly promotes proliferation of plant cells in culture at very low concentrations. Oryza sativa PSK (OsPSK) cDNA encoding a PSK-alpha precursor has been isolated. The cDNA is 725 base pairs long, and the 89-aa product, preprophytosulfokine, has a 22-aa hydrophobic region that resembles a cleavable leader peptide at its NH(2) terminus. The PSK-alpha sequence occurs only once… CONTINUE READING

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