• Species Reactivity

  Human, Mouse

• Specificity

  Detects human Carbonic Anhydrase VIII/CA8 in direct ELISAs and Western blots. In direct ELISAs, approximately 5% cross-reactivity with recombinant human (rh) CA2 and rhCA3 is observed and less than 1% cross-reactivity with rhCA1, rhCA4, and rhCA9 is observed.

• Source

  Polyclonal Goat IgG

• Purification

  Antigen Affinity-purified

• Immunogen

  E. coli-derived recombinant human Carbonic Anhydrase VIII/CA8    
  Ala2-Gln290    
  Accession # P35219

• Formulation

  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.

• Label

  Unconjugated

Applications

• Recommended    
  Concentration

  Sample

• Western Blot

  0.5 µg/mL

  See below

• 
  

• Simple Western

  5 µg/mL

  See below

• 
  

• Immunoprecipitation

  25 µg/mL

  Conditioned cell culture medium spiked with Recombinant Human Carbonic Anhydrase VIII (Catalog # ),

• 
  

Please Note: Optimal dilutions should be determined by each laboratory for each application.  are available in the Technical Information section on our website.

Data Examples

Preparation and Storage

• Reconstitution

  Reconstitute at 0.2 mg/mL in sterile PBS.

• Shipping

  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.

Background: Carbonic Anhydrase VIII/CA8

Carbonic Anhydrase (CA) catalyzes the reversible reaction of CO₂ + H₂O = HCO₃^- + H⁺, which is fundamental to many processes such as respiration, renal tubular acidification and bone resorption (1). Topics in a CA meeting (6^th International Conference on the CAs, June 20‑25, 2003, Slovakia) ranged from the use of CAs as markers for tumor and hypoxia in the clinic, as a nutritional supplement in milk, and as a tool for CO₂ removal and mosquito control in industry. CA8, also called CA‑related protein (CARP), is a cytosolic protein without CA activity (i.e., the reversible hydration of CO₂) due to point mutations in the zinc-binding site (2). Nevertheless, it has esterase activity described in the Activity Assay Protocol. CA8 is expressed exclusively in Purkinje cells of the cerebellum, where it binds inositol 1,4,5‑triphosphate receptor type 1 (3). CA8 overexpression in human colorectal cancer and non-small cell lung cancer indicates that it plays a role in the process of invasion in these types of malignancy (4, 5).

• References:

1. Hewett-Emmett, D. and R.E. Tashian (1996) Mol. Phylogenet. Evol. 5:50.

2. Sjoblom, J. et al. (1996) FEBS Lett. 398: 322.

3. Hirota, J. et al. (2003) Biochem. J. 372: 435.

4. Miyaji, E. et al. (2003) J. Pathol. 201: 37.

5. Lu, S.H. et al. (2004) Lung Cancer 44: 273.

• Entrez Gene IDs:

  767 (Human)

• Alternate Names:

  CA8; CALS; CALScarbonate dehydratase; CAMRQ3; Carbonic Anhydrase VIII; carbonic anhydrase VIIIMGC99509; carbonic anhydrase-like sequence; carbonic anhydrase-related protein; CARP; CARPCA-related protein; CA-VIII; MGC120502