Researchers create protein map of saliva

US researchers have identified all 1,116 unique proteins found in human saliva glands, a discovery they said yesterday could usher in a wave of convenient, spit-based diagnostic tests that could be done without the need for a single drop of blood.

As many as 20 percent of the proteins that are found in saliva are also found in blood, said Fred Hagan, a researcher at the University of Rochester Medical Center in New York who worked on the study.

"This is potentially a large field that has many clinical implications in the area of disease diagnostics," said Hagan, whose work was published in the Journal of Proteome Research.