News FocusDevelopmental Biology

Many Modes of Transport for an Embryo's Signals

See allHide authors and affiliations

Science  13 Aug 1999:
Vol. 285, Issue 5430, pp. 1003-1005
DOI: 10.1126/science.285.5430.1003

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


New studies are offering a first glimpse into what may be a complex transportation system within the developing embryo. In contrast to the classic paradigm in which a developmental signaling molecule diffuses freely from its source, researchers are discovering that embryos may use intracellular "railroads" and newly discovered cellular extensions to actively ship key signaling molecules from place to place. Although the work is preliminary and few papers have sewn up the details of these new modes of transport, the findings are giving development researchers new food for thought.