The NC2 alpha and beta subunits play different roles in vivo.

Abstract excerpt

NC2 is a heterodimeric regulator of transcription that plays both positive and negative roles in vivo. Here we show that the alpha and beta subunits of yeast NC2 are not always associated in a tight complex. Rather, their association is regulated, in particular by glucose depletion. Indeed, stable NC2 alpha/beta complexes can only be purified from cells after the diauxic shift when glucose has been depleted from...

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