IBH1 cDNA ORF clone, Arabidopsis thaliana(thale cress)

Sequence and analysis of chromosome 2 of the plant Arabidopsis thaliana.
Lin X, Kaul S, Rounsley S, Shea TP, Benito MI, Town CD, Fujii CY, Mason T, Bowman CL, Barnstead M, Feldblyum TV, Buell CR, Ketchum KA, Lee J, Ronning CM, Koo HL, Moffat KS, Cronin LA, Shen M, Pai G, Van Aken S, Umayam L, Tallon LJ, Gill JE, Adams MD, Carrera AJ, Creasy TH, Goodman HM, Somerville CR, Copenhaver GP, Preuss D, Nierman WC, White O, Eisen JA, Salzberg SL, Fraser CM, Venter JC
Nature402(6763)761-8(1999 Dec)

HBI1 interacts with IBH1 which likely keep HBI1 under negative control.
Title: Antagonistic regulation of growth and immunity by the Arabidopsis basic helix-loop-helix transcription factor homolog of brassinosteroid enhanced expression2 interacting with increased leaf inclination1 binding bHLH1.

IBH1 repressed direct IBL1 transcription, and they both acted in tandem to suppress the expression of a common downstream helix-loop-helix (HLH)/bHLH network, thus forming an incoherent feed-forward loop.
Title: Helix-loop-helix/basic helix-loop-helix transcription factor network represses cell elongation in Arabidopsis through an apparent incoherent feed-forward loop.

The expression of IBH1 and PRE1 is regulated by brassinosteroid, gibberellins, and developmental phase dependent factors, indicating that two phytohormones and phase-dependent signals are integrated by this triantagonistic bHLH system.
Title: A triantagonistic basic helix-loop-helix system regulates cell elongation in Arabidopsis.

PRE1-AtIBH1 is a conserved pair of antagonistic HLH/bHLH transcription factors that function downstream of BZR1 to mediate brassinosteroid regulation of cell elongation. [IBH1]
Title: Antagonistic HLH/bHLH transcription factors mediate brassinosteroid regulation of cell elongation and plant development in rice and Arabidopsis.