Nuclear localization sequences (NLSs) consist of a stretch of positively charged residues associated with importin, which will subsequently shuttle its cargo into the nucleus [ 14].
(Ironically, the space station's demands on the shuttle fleet mean that essential repairs to the Hubble, which will require a shuttle mission, may have to be postponed).The ASCB report also casts doubt on the merits of growing crystals in space, for use in pharmaceutical research.
Shuttle Atlantis is already sitting on the launch pad, awaiting its July blastoff date, which will conclude NASA's shuttle missions.
The space shuttle, which will be retired in 2010, can lift about 60,000 pounds, and the current generation of expendable rockets lift only about 40,000 pounds.
Engineers are concerned that a new rocket, the Ares I, which will replace the space shuttle and send astronauts on their way to the moon, could shake violently during the first minutes of flight.
Nasa still has to decide if it wants to fly out the launch-on-need shuttle which will be prepared as a rescue ship for Endeavour's last flight.
Nasa is currently in the process of developing a successor to the 29-year-old shuttle, which will retire in 2011.
The shuttle, which will ride atop a modified jumbo jet, will be en route from the Kennedy Space Center in Florida to Discovery's new home at the Smithsonian Institution's National Air and Space Museum Udvar-Hazy Cenear near Dulles International Airport.
Out With the Old The Intrepid museum makes way for the arrival of the Enterprise, the prototype for the space shuttles, which will fly into New York City next week and is expected to go on display in July.
Shuttles, which will be free for riders, will run complementary to the city's existing DASH transportation fleet.
