Forkhead box proteins (FOX proteins) play important roles in regulating the expression of genes involved in cell growth, proliferation, differentiation, and longevity. Many FOX proteins are important to embryonic development. A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ... Longevity is long life or existence. ...

The defining feature of FOX proteins is the forkhead box, a sequence of 80 to 100 amino acids forming a motif that binds to DNA. This ability to bind to DNA allows FOX proteins to regulate the expression of target genes. A sequence motif is a nucleotide or amino-acid sequence pattern that is widespread and has, or is conjectured to have, a biological significance. ... Space-filling model of a section of DNA molecule Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions specifying the biological development of all cellular forms of life (and many viruses). ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...

One of the most famous FOX protein genes is FOXP2 as it has been implicated in the acquisition of grammatical skills. FOXP2 (forkhead box P2) is a gene that is implicated in the development of language skills, including grammatical competence. ...

Many other genes encoding FOX proteins have been identified. For example, the FOXF2 gene encodes forkhead box F2, one of many human homologues of the Drosophila melanogaster transcription factor forkhead. FOXF2 is expressed in lung and placenta. Binomial name Drosophila melanogaster Meigen, 1830 dorsal view Drosophila melanogaster (Black-bellied Dew-lover) a dipteran (two-winged) insect, is the species of fruit fly that is commonly used in genetic experiments; it is among the most important model organisms. ... In molecular biology, a transcription factor is a protein that binds DNA at a specific promoter or enhancer region or site, where it regulates transcription. ...

Some FOX genes are downstream targets of Sonic hedgehog (Shh) signaling. This is significant because Shh signaling plays a role in the development of basal cell carcinomas. Sonic hedgehog (SHH) is one of three proteins in the hedgehog (HH) family, the others being desert hedgehog (DHH) and indian hedgehog (IHH). ... In medicine, carcinoma is any cancer that arises from epithelial cells. ...