Example sentences for: bhlh
How can you use “bhlh” in a sentence? Here are some example sentences to help you improve your vocabulary:
ID2 was recently shown also to be a target of activated β-catenin in colon carcinoma cells [ 13 ] . It is a general inhibitor of the bHLH proteins such as MyoD and E12/E47 [ 14 ] and can interact with the tumor suppressor RB1 [ 15 ] . MSX1 expression can revert differentiated myotubes into an undifferentiated state [ 16 ] . REST/NRSF is known to block neural differentiation by binding to and inhibiting the expression of neuronal genes [ 17 18 ] . To what extent these genes are controlled by Wnt signaling in intact animals or in other cell types is not clear yet, but we do note that MSX mutants have phenotypes similar to LEF/TCF mutants [ 19 20 ] .
In mammals, the positive elements are two basic helix-loop-helix (bHLH) PAS-domain-containing transcription factors, CLOCK and BMAL1, that form heterodimers that can drive the transcription of three period ( per ) genes per1-3 and two cryptochromes ( cry1,2 ). PER1,2 and CRY1,2 proteins suppress CLOCK:BMAL1-mediated transcription thereby forming the negative elements in the feedback loop.
A specific complex that formed a Dnase I footprint (-306 to -265) in the cAMP-responsive region of the RIIβ promoter in granulosa cells [ 18 ] , covers a consensus E-box (CACGTG) known to bind helix-loop-helix (bHLH) transcription factors.
It has been shown that the differentiation of pillar cells depends on activation of Fgfr3 [ 26 ] by FGF's, probably Fgf8, a factor produced by developing and mature inner hair cells [ 18 27 ] . The formation of supporting cells also appears to depend on the proper expression of various bHLH factors such as Hes 1 and 5 which appear to be regulated by the Notch signaling pathway [ 17 28 29 ] . It is possible that the apparent inability of fibers to extend along outer hair cells is related to the lack of differentiation of supporting cells in the absence of mature hair cells.
SREBPs are critically important basic helix-loop helix (bHLH) transcription factors activated in response to variations in intracellular cholesterol levels that induce transcription of genes with sterol regulatory element (SRE) and E-box containing promoters.
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