This type of feather is also found in McKellar's amber and some of them have barbules wit tight coils at their bases. (discovermagazine.com)
Inactive regions of DNA are twisted into tight coils, whereas active regions are open and accessible to the cellular machinery that reads the genetic information. (sciencedaily.com)
I feel like it stretches out my otherwise usually tighter coils, which is always a plus especially when styling (thebeautybeau.com)