The homeodomain of the transcription factor LF-B1 has a 21 amino acid loop between helix 2 and helix 3.
Finney
M
M
D000595:Amino Acid Sequence; D000818:Animals; D004268:DNA-Binding Proteins; D005801:Genes, Homeobox; D051537:Hepatocyte Nuclear Factor 1; D051538:Hepatocyte Nuclear Factor 1-alpha; D051539:Hepatocyte Nuclear Factor 1-beta; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D011487:Protein Conformation; D014157:Transcription Factors / Q000235:genetics*
D004268:DNA-Binding Proteins; D051538:Hepatocyte Nuclear Factor 1-alpha; D009687:Nuclear Proteins; D014157:Transcription Factors; D051537:Hepatocyte Nuclear Factor 1; D051539:Hepatocyte Nuclear Factor 1-beta