Protein sister of odd and bowel; Pair-rule protein that determines both the size and polarity of even-numbered as well as odd-numbered parasegments during embryogenesis. DNA-binding transcription factor that acts primarily as a transcriptional repressor but can also function as a transcriptional activator, depending on the stage of development and spatial restrictions (By similarity). May function redundantly with odd and drm in leg joint formation during the larval stages, acting downstream of Notch activation.

Protein odd-skipped; Pair-rule protein that determines both the size and polarity of even-numbered as well as odd-numbered parasegments during embryogenesis. DNA-binding transcription factor that acts primarily as a transcriptional repressor but can also function as a transcriptional activator, depending on the stage of development and spatial restrictions. May function redundantly with odd and drm in leg joint formation during the larval stages, acting downstream of Notch activation.

Protein bowel; Putative transcription factor. Required for leg joint formation, acting downstream of Notch to pattern the leg tarsal segments. Functions in the terminal pathway during embryogenesis, acting downstream of tll in the posterior of the embryo. Acts in a hierarchy downstream of drm and lin during foregut and hindgut patterning and morphogenesis. Involved in cell rearrangement during elongation of the embryonic hindgut. Regulates expression of hindgut patterning genes to establish the small intestine region of the embryonic hindgut. Required in the foregut for spatially local [...]

Zygotic gap protein knirps; Transcriptional repressor. Binds to multiple sites in the eve stripe 3 enhancer element. Plays an essential role in the segmentation process both by refining the expression patterns of gap genes and by establishing pair-rules stripes of gene expression.

Twist (twi) encodes a transcription factor required for mesoderm cell fate. The product of twi is essential for gastrulation, the development of mesodermal derivatives, including somatic and visceral muscle, fat body and maintenance of muscle stem cells.

Huckebein (hkb) is expressed in patches within the embryonic neuroectoderm and a subset of neuroblasts and their progeny, where it is required for proper neuronal specification and axon targeting. It is a terminal gap gene mediating the maternal terminal information at the posterior end of the blastoderm embryo.

Zelda, isoform A; Zelda (zld) encodes a zinc finger transcription factor that functions in early blastoderm development. It works as a zygotic genome activator because it has a global role in regulating early expressed genes, such as genes essential for cellularization, sex determination and pattern formation. It is also required at later times in development.

Protein tailless; Orphan receptor that binds DNA as a monomer to hormone response elements (HRE) containing an extended core motif half-site sequence 5'-AAGTCA-3' in which the 5' flanking nucleotides participate in determining receptor specificity. This receptor binds to the consensus sequence [AG][AG]AAGTCAA. Plays a key role in the establishment of non-metameric domains at the anterior and posterior poles of the embryo. It may also play a role in the nervous system. The maternal terminal pathway activates the tll gene in the termini; TLL activity then represses segmentation and activ [...]

Sloppy paired 1 (slp1) encodes a transcription factor of the fork-head family that functions by interacting with the corepressor encoded by gro. The product of slp1 regulates a wide variety of developmental processes including embryonic segmentation, ventral fate specification in the retina, and temporal patterning of the neuroblasts that produce medulla neurons.