Clone OX-7 is a mouse IgG1 monoclonal antibody that recognises the allelic marker CD90.1 (Thy-1.1) and cross-reacts with rat CD90, while showing no reactivity to the CD90.2 (Thy-1.2) allele carried by most common inbred strains. This allotype specificity is what makes OX-7 particularly useful for in-vivo work: in adoptive-transfer and bone-marrow chimera designs, CD90.1-marked donor cells can be tracked, gated, or selectively depleted in a CD90.2 host without touching endogenous compartments. This ichor.bio preparation is supplied low-endotoxin (research grade <1 EU/mg; ultra-low <0.5 EU/mg), purified, and offered in bulk milligram-to-gram quantities suited to repeat-dosing animal studies. It is validated for depletion alongside flow cytometry, immunofluorescence, and immunohistochemistry, so the same clone can be used to deplete and then confirm depletion. The format supports functional in-vivo cell-ablation and cell-tracking experiments as well as ex-vivo phenotyping. For research use only (RUO); not for diagnostic or therapeutic use. All content here is guidance for ichorbio to review before publishing.
CD90.1 (Thy-1.1) is one of two allelic forms of Thy-1, a small glycosylphosphatidylinositol (GPI)-anchored cell-surface glycoprotein of the immunoglobulin superfamily. Thy-1 is expressed broadly on mouse thymocytes and peripheral T cells, on subsets of haematopoietic stem and progenitor cells, and on neurons, fibroblasts, and other stromal populations. The CD90.1 versus CD90.2 distinction is an allotypic polymorphism: CD90.1 is carried by strains such as AKR/J, PL, and FVB/N, whereas most laboratory strains (e.g. C57BL/6, BALB/c) carry CD90.2. Because the two alleles are congenically distinguishable, CD90.1 is widely exploited as a lineage-tracing and congenic marker to separate transferred donor cells from host cells. Functionally, Thy-1 participates in T-cell activation, cell-cell and cell-matrix adhesion, and neurite outgrowth, though its role as an allelic marker dominates its experimental use.