This increase did not quite reach statistical significance but statistically significant increases in ubiquitination of liprin-α1 were observed in immunoprecipitates from cells transfected with the neuronal LNX1p70 isoform ( p < 0.05), which lacks the RING finger domain required for ubiquitination, and LNX2 ( p < 0.05), compared to the control vector ( Fig 3B , upper graph).
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Proteomic analysis reveals novel ligands and substrates for LNX1 E3 ubiquitin ligase.
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The sentences
Thus, some interaction pairs that have been identified by yeast-two-hybrid or protein/peptide arrays may not be significant in a mammalian cellular context in which many potential ligands are binding competitively to LNX proteins.