Purified by multi-step column chromatography. Purity >95% on silver stained SDS-PAGE

Preservative and carrier-free in endotoxin free phosphate buffered saline, pH 7.4. Filtered through 0.22µm filter.

(1) Fel d 2 is a serum albumin

(2) Upper band is a Fel d 2 dime

(3) Not tested for endotoxin

Natural Fel d 2 Certificate of Analysis

1. Hilger C, Grigioni F, Hentges F. Sequence of the gene encoding cat (Felis domesticus) serum albumin. Gene. 1996 Mar 9;169(2):295-6.

2. Reininger R, Swoboda I, Bohle B, Hauswirth AW, Valent P, Rumpold H, Valenta R, Spitzauer S. Characterization of recombinant cat albumin. Clin Exp Allergy. 2003;33(12):1695-702.

3. Hilger C, Kohnen M, Grigioni F, Lehners C, Hentges F. Allergic cross-reactions between cat and pig serum albumin. Study at the protein and DNA levels. Allergy. 1997;52(2):179-87.

4. Goubran Botros H, Gregoire C, Rabillon J, David B, Dandeu JP. Cross-antigenicity of horse serum albumin with dog and cat albumins: study of three short peptides with significant inhibitory activity towards specific human IgE and IgG antibodies. Immunology. 1996;88(3):340-7.