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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Competitive protein binding assay for activin A/ EDF using follistatin determination of activin levels in human plasma.

A sensitive and specific protein binding assay for activin A/ EDF (activin) was developed using follistatin as a binding protein and [125I] labelled activin as a tracer. As 50% acetonitrile (CH3CN) separated free and follistatin- bound activin, plasma pretreated with an equal volume of CH3CN was used as the assay sample and B/F separation was also done with 50% CH3CN. The recovery of the assay was 85.0% and its sensitivity was 0.5 ng/ml. Crossreactivity with inhibin A was 1.8%. The mean plasma level of follistatin-free activin in normal subjects was 1.3 +/- 0.7%. (M +/- SD) ng/ml. Plasma free activin levels were generally elevated in patients with chronic renal failure or hematological diseases associated with anemia.[1]

References

  1. Competitive protein binding assay for activin A/EDF using follistatin determination of activin levels in human plasma. Demura, R., Suzuki, T., Tajima, S., Mitsuhashi, S., Odagiri, E., Eto, Y., Sugino, H., Demura, H. Biochem. Biophys. Res. Commun. (1992) [Pubmed]
 
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