The bHLH-ZIP protein Mad heterodimerizes with Max as a sequence-specific transcriptional repressor. Mad is rapidly induced upon differentiation, and the associated switch from Myc-Max to Mad-Max heterocomplexes seem to repress genes normally activated by Myc-Max. We have identified two related mammalian cDNAs that encode Mad-binding proteins. Both possess sequence homology with the yeast transc...

Mad is a basic region helix-loop-helix leucine zipper transcription factor which can dimerize with the Max protein and antagonize transcriptional activation by the Myc-Max transcription factor heterodimer. While the expression of Myc is necessary for cell proliferation, the expression of Mad is induced upon differentiation of at least some leukemia cell lines. Here, the expression of the mad ge...

The modified Atkins diet (MAD) consists of a nearly balanced diet without any age-dependent restriction of recommended daily calorie intake. Recently, there has been a marked increase in the use of the MAD in the treatment of epilepsy. Over the last 8 years, evidence suggesting that the MAD may exhibit similar anticonvulsant properties as the traditional ketogenic diet (KD) has been accumulatin...

M oyle et al. de-s c r i b e h ow the C. elegans BUB-1 kinase helps recruit the spindle checkpoint proteins MAD-1 and MAD-2 to unattached kinetochores. During mitosis, the MAD-1–MAD-2 complex binds to kinetochores that haven't attached to the spindle and generates a signal that prevents cells from entering anaphase until the correct attachments are formed. Several kinetochore proteins are requi...