Scientists in New York and North Carolina are reporting assembly of the first functioning prototype of an artificial Golgi organelle. That key structure inside cells helps process and package hormones, enzymes, and other substances that allow the body to function normally. The lab-on-a-chip device could lead to a faster and safer method for producing heparin, the widely used anticoagulant or blood thinner, the researchers note. Their study is scheduled for the Aug. 12 issue of the Journal of the American Chemical Society, a weekly publication.