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The Krüppel (Kr) protein, bound at kilobase distances from the start site of transcription, represses transcription by RNA polymerase II in mammalian cells. Repression is monotonically dependent on the dose of Kr protein and the presence of Kr binding site(s) on the DNA. These data suggest an inhibitory protein-protein interaction between the Kr protein and(More)
We have extracted the cell surface polysaccharide antigen (PS) and protein antigen from an encapsulated and virulent strain of Porphyromonas gingivalis 16-1. The PS was separated from lipopolysaccharide (LPS) by Sephacryl S-300 gel chromatography. It was distinguished from LPS by immunodiffusion with homologous rabbit antiserum. The PS reacted specifically(More)
We constructed and tested a number of lac repressor fusion proteins containing various portions of the zinc-finger containing protein NGFIA for their ability to stimulate transcription of a reporter gene containing lac operators. NGFIA contains two transcription activation regions, found in two distinct regions of the protein. The carboxyl (C) terminal(More)
We previously demonstrated that the Drosophila Krüppel protein is a transcriptional repressor with separable DNA-binding and transcriptional repression activities. In this study, the minimal amino (N)-terminal repression region of the Krüppel protein was defined by transferring regions of the Krüppel protein to a heterologous DNA-binding protein, the lacI(More)
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