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. 2000 Sep 5;97(19):10436–10441. doi: 10.1073/pnas.170301897

Figure 2.

Figure 2

Amino acid sequence lineups of bHLH families. Residues with predicted structural function are in bold (5); 1, DNA binding; 2, helix formation. Residues with amino acid identity between the family members illustrated are shaded. (a) Atonal-related. (b) p48-related. (c) Hand-related. (d) HES family; omission of residues in the loop region of this family is marked with two slashes (//). (e) Mesp-related. (f) bHLH-PAS. (g) CG11450/Shout. (f) USF family (note: the loop and the second helix domains of CG17592 are extended with respect to USF2 and contain multiple serine residues).