Detects human TAFA1/FAM19A1 in direct ELISAs and Western blots. In direct ELISAs, approximately 15% cross-reactivity with recombinant human (rh) TAFA3 and rhTAFA4 is observed, less than 10% cross-reactivity with rhTAFA2 is observed and less than 1% cross-reactivity with rhTAFA5 is observed.
Polyclonal Goat IgG
E. coli-derived recombinant human TAFA1/FAM19A1 Ser26-Thr133 Accession # NP_998774
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
Recombinant Human TAFA1/FAM19A1 (Catalog # 5154-TA)
Measured by its ability to neutralize the the enhancemment of neurite outgrowth of cortical neurons from E16-E18 rat embryos induced by TAFA-1. The Neutralization Dose (ND50) is typically 15 µg/mL in the presence of 10 µg/mL Recombinant Human TAFA-1.
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
TAFA1/FAM19A1 in Human Brain. TAFA1/FAM19A1 was detected in immersion fixed paraffin-embedded sections of human brain (cortex) using Goat Anti-Human TAFA1/FAM19A1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF5154) at 15 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Lower panel shows a lack of labeling when primary antibodies are omitted and tissue is stained only with secondary antibody followed by incubation with detection reagents. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Preparation and Storage
Sterile PBS to a final concentration of 0.2 mg/mL.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
TAFA1 (also FAM19A1) is a secreted, 13 kDa member of the FAM19/TAFA family of chemokine-like proteins (1). It is synthesized as a 133 amino acid (aa) precursor that contains a 19 aa signal sequence and a 114 aa mature chain. Like other members of the FAM19/TAFA family, mature TAFA1 contains 10 regularly spaced cysteine residues that follow the pattern CX7CCX13CXCX14CX11CX4CX5CX10C, in which C represents a conserved cysteine residue and X represents a noncysteine amino acid (1). Human TAFA1 is 100% aa identical to mouse TAFA1. TAFA1 is expressed exclusively in the brain, with highest expression in the frontal cortex, temporal cortex, occipital cortex, parietal cortex and medulla, and low levels in the basal ganglion, thalamus, and cerebellum (1). The biological functions of TAFA family members remain to be determined, but there are a few tentative hypotheses. First, TAFAs may modulate immune responses in the CNS by functioning as brain-specific chemokines, and may act with other chemokines to optimize the recruitment and activity of immune cells in the CNS (1). Second, TAFAs may represent a novel class of neurokines that act as regulators of immune nervous cells (1, 2). And third, TAFAs may control axonal sprouting following brain injury (1).
Tang, Y.T. et al. (2004) Genomics 83:727.
Benveniste, E. (1998) Cytokine Growth Factor Rev. 9:259.
Family with Sequence Similarity 19, Member A1
Entrez Gene IDs:
407738 (Human); 320265 (Mouse); 500266 (Rat)
Chemokine-like protein TAFA-1; FAM19A1; family with sequence similarity 19 (chemokine (C-C motif)-like), member A1; TAFA1; TAFA-1
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