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![Bioactivity FSTL5 [Unconjugated]](http://images.novusbio.com/fullsize2/Follistatinlike_5_9066FN_1123.jpg)
![Bioactivity FSTL5 [Unconjugated]](http://images.novusbio.com/fullsize2/Follistatinlike_5_9065FN_1124.jpg)