Abstract: The present invention relates to a microvesicle comprising: (i) a membrane-associated protein comprising at least one first dimerization domain, (ii) a carrier protein comprising at least one second dimerization domain, and (iii) a solute that binds to the carrier protein, wherein the solute is selected from the group of: DNA, RNA, protein, carbohydrate, ribosomes, mitochondria, and small molecules. Also provided are cells, reagents and kits that find use in making the microvesicles, as well as methods of using the microvesicles, e.g.