Little more than three weeks after MESSENGER’s first historic flyby of Mercury, the team this week began mapping out its trajectory and observation plans for the probe’s second pass of the planet this ...

The solar system’s neglected stepchild until recently, the planet has now been scrutinized twice at close range by the MESSENGER spacecraft. The craft’s most recent flyby, on October 6, 2008, has ...

Extracellular stimuli elicit cellular responses through generation of intracellular second messengers. The lipid second messenger diacylglycerol is produced following activation of the ...

When Mariner 10 flew past Mercury three times in 1974 and 1975, the probe imaged less than half the planet. In January, during MESSENGER’s first flyby, its cameras returned images of about 20 percent ...

NASA’s MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft swung by Venus for the second time early this evening for a gravity assist that shrank the radius of its ...

Ceramide has been proposed as a second messenger for stress-induced apoptosis. By characterization of murine melanoma cells and their E1A transfectants, we found several lines of evidences against the ...

3 Review Roundup: STEPHEN SONDHEIM'S OLD FRIENDS Opens On Broadway 1st Murderer/ Governor of Paris Off-Broadway The Chronicles of King Henry VI, Part 2 1970 1st Rebel/ Tutor/ 2nd Watchman/ Messenger ...

A new study describes the development of a cAMP analogue that specifically activates only Epac2, one of several cAMP-responsive proteins. Furthermore, the analogue activates Epac2 more potently than ...