Method for the purification of mycobacterial protein antigens and resulting product
US4123427A · kind A · utility
Inventor
Key dates
| Filing date | Jul 27, 1976 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Jul 27, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S530/825
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The subject invention is directed in general to a method of preparing an antigen using immunoabsorbent affinity chromotography particularly in cases where an antigen is used for the recognition and measurement of hypersensitivity and where antigenic specificity is desired as, for example, in hypersensitivity to tuberculin, histoplasmin, coccidioidin, and common inhalant allergens. More particularly, this invention consists of a method which includes the following steps: immunizing a suitable host animal, usually a goat, with a preparation containing the desired antigen, collecting antisera from the animal and selecting the most specific antisera; isolating the antibody containing gamma globulin from the selected antiserum; coupling the globulin to an inert substrate (usually agarose beads) by chemical bonding with cyanogen bromide to form an absorbent in which the antibody acts as ligand; using the absorbent to bind selectively the desired antigen in a crude mixture containing the antigen; eluting the antigen from the absorbent by breaking the antigen-antibody bond with urea, usually at 4 - 6 molar (also referred to as M in the specification) and about pH 7 - 9; and then recovering…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.