|HOXB1 in NTera‑2 Human Cell Line. HOXB1 was detected in immersion fixed NTera‑2 human testicular embryonic carcinoma cells, treated with (upper panel) and without (lower panel) retinoic acid, using Sheep Anti-Human HOXB1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6318) at 10 µg/mL for 3 hours at room temperature. Cells were stained using the NorthernLights™ 557-conjugated Anti-Sheep IgG Secondary Antibody (red; Catalog # NL010) and counterstained with DAPI (blue). Specific staining was localized to nuclei. View our protocol for Fluorescent ICC Staining of Cells on Coverslips.|
HOXB1 (Homeobox protein B1; also HOX-2I) is a 32 kDa (predicted) member of the Antp homeobox family, labial subfamily of transcription factors. It is expressed in rhombomere-4 (r-4) of the hindbrain, where it drives the development of r-4 derived structures. Among these are the motor neurons of the facial nerve, and neural crest cells that form Schwann cells plus cartilage and bone of the neck and ear. Human HOXB1 is 301 amino acids (aa) in length. It contains an Antp-type hexapeptide (aa 179-184) that mediates heterodimerization, and a DNA-binding homeobox domain (aa 203-262). There is one potential splice variant that shows a 40 aa substitution for aa 193-301. Over aa 1-192, human HOXB1 shares 82% aa identity with mouse HOXB1.
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