PMID: 7034721Sep 1, 1981Paper

Isolation and characterization of rat plasma fibronectin

The Biochemical Journal
R E Weiss, A H Reddi

Abstract

Rat plasma fibronectin has been isolated and characterized and monospecific antibodies were prepared to it. Two components of fresh rat plasma (in the presence of proteinase inhibitors) bound to a gelatin-Sepharose affinity column. One protein was eluted with 4.0 M-urea and was identified as fibronectin. Another protein was eluted from the gelatin-Sepharose column with 8.0 M-urea and was identified as a 70 000-Mr collagen-binding molecule. This 70 000-Mr fragment was found to be a normal constituent of blood plasma, and its presence did not represent a proteolytic degradation product formed during isolation. The antibodies prepared against rat fibronectin only weakly cross-reacted with plasma fibronectins of chicken, horse and human. These studies shed light on the metabolic interrelationships between fibronectin and other collagen-binding molecules.

Citations

Dec 1, 1988·Experimental and Molecular Pathology·K M ConnollyT LaBrie
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