The maize regulatory locus Opaque-2 encodes a DNA-binding protein which activates the transcription of the b-32 gene.

@article{Lohmer1991TheMR,
  title={The maize regulatory locus Opaque-2 encodes a DNA-binding protein which activates the transcription of the b-32 gene.},
  author={Stephan Lohmer and Massimo Maddaloni and Mario Motto and Natale Di Fonzo and Hans Hartings and Francesco Salamini and Richard D. Thompson},
  journal={The EMBO journal},
  year={1991},
  volume={10 3},
  pages={617-24}
}
The maize locus, Opaque-2, controls the expression in developing endosperm of structural genes encoding a family of storage proteins, the 22 kd zeins, and an abundant albumin, termed b-32. It is shown that the promoter of the b-32 gene is activated in vivo in the presence of the O2 gene product and that the information necessary for this activation resides in a 440 bp DNA fragment containing five O2 binding sites (GATGAPyPuTGPu). Two of these sites are embedded in copies of the 'endosperm box… CONTINUE READING
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