MicroRNAs, small RNA molecules that regulate gene expression, have been found to circulate in blood within lipid membrane-encased particles (exosomes) that are secreted from and blebbed off of cancer cells.    From Wordnik.com. Reference

Or black-eyed bean-flower blebbed with dew.    From Wordnik.com.  [Life and Remains of John Clare "The Northamptonshire Peasant Poet"] Reference