Stable thioesters in biological millieu?

It seems that most thioesters are highly reactive in cells and blood due to the high concentration of biological thiols. Are there any derivatives of thioesters that are stabilized at physiological conditions by certain functional groups? Fatty acid metabolism is mediated by transfer of CoA to the fatty acid, so I imagine this bond must be somewhat stable. Is this stabilized by the nitrogen that sits a couple carbons away from the thioester?


