Immunoaffinity chromatography of canine high-molecular-weight renin: partial purification and characterization.
Canine high-molecular-weight renin (mol. wt. 60 000) is believed to be a complex of renin (low-molecular-weight form, mol. wt. 40 000) and renin-binding substance. The immunocross-reactivity of high-molecular-weight renin and low-molecular-weight renin was demonstrated by using antibodies specific to low-molecular-weight renin. Immunoaffinity chromatography with renin-specific antibodies coupled to Sepharose provided a simple and specific method for isolation of high-molecular-weight renin. High-molecular-weight renin with a specific activity of 137 600 ng of ANG I h-1 mg-1 of protein (19.6 Goldblatt units/mg of protein) was obtained. This high-molecular-weight renin was stable in dithiothreitol (25 mmol/l), suggesting that disulphide bonds may not be involved in the binding mechanism between low-molecular-weight renin and renin-binding substance. However, exposure to low pH (3.0) resulted in conversion of high-molecular-weight renin into the low-molecular-weight form.
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- Renin
- Molecular Weight
- Kidney
- Dogs
- Chromatography, Gel
- Chromatography, Affinity
- Cardiovascular System & Hematology
- Antibodies
- Animals
- 42 Health sciences
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Renin
- Molecular Weight
- Kidney
- Dogs
- Chromatography, Gel
- Chromatography, Affinity
- Cardiovascular System & Hematology
- Antibodies
- Animals
- 42 Health sciences