Fibronectin

440 kDa. The protein is a dimer of two 220 kDa identical subunits. It shows up as 220 kDa on a reduced gel, and 440 kDa on a non-reduced gel.

The fibronectin (Cat. No. 5080-5MG) is prepared in a glycine/NaCl buffer and when the lyophilized pellet is reconstituted with sterile water at a 1 mg/ml concentration the resulting pH is neutral (~7.4-7.6).

Fibronectin has two nearly identical molecules that are linked together in a dimer configuration. Each of those molecules has one RGD site: https://doi.org/10.1002/iub.493