Washington, February 20 : Scientists at the University of Illinois say that they have found how a cellular protein recognizes an invading virus and alerts the body to the infection.

Taekjip Ha, a physics professor and Howard Hughes Medical Institute investigator, says that the study settles a debate over how the protein, RIG-I (pronounced rig-EYE), is able to distinguish between viral RNA and self (or cellular) RNA.

"RIG-I is the first molecule in the immune response to detect viral RNA," said Sua Myong, lead author on the study and a professor at the U. of I.''s Institute for Genomic Biology.

Washington, Feb 20 : Hollywood actress Julia Roberts is planning to return to Broadway once again, after her debut in 2006 was badly panned by the critics.

Though Julia's Broadway play `Three Days Of Rain' with Paul Rudd and Bradley Cooper lacked the expected appeal, the `Erin Brockovich' actress is keen to make a comeback.

She is even determined to make a better choice of role this time.

"I would like to do it one more time, understanding the shape of the beast better now," Contactmusic quoted her as telling Allure magazine.

Washington, February 20 : An American study has shed some light on how microscopic changes to brain cause schizophrenia.

"We found several microscopic pathologies and behavioral traits that are hallmarks of schizophrenia. These findings in mice may help shed light on how schizophrenia, an often severe and debilitating disease, emerges in humans," says Dr. Ulrich Mueller, a professor at Scripps Research, who was senior author of the study published in the journal Proceedings of the National Academy of Sciences.

Washington, Feb 20 : Hollywood actress Kate Winslet almost missed her Golden Globe winning role in `The Reader', for the producers thought that she too busy with `The Revolutionary Road' to join the venture.

Film mogul Harvey Weinstein, whose company was behind the flick, and director Stephen Daldry approached many other actresses like Nicole Kidman, who fell pregnant during that time, Naomi Watts and Marion Cotillard, as they thought Kate was busy with `The Revolutionary Road'.

Washington, Feb 20 : Although Hollywood actor Heath Ledger's father, Kim, is more than proud that his son has been nominated for the esteemed Oscar award, he feels that going to the ceremony on behalf of his late son will be a "bittersweet" experience.

Kim says that if is his late son wins, he definitely speak a few words.

He, however, adds that it is not necessary that Heath will only win, as anything can happen at the Oscars.

"I may say a few words," US Weekly quoted him as telling TMZ. Com.

Washington, Feb 20 : Hollywood actor Rob Pattinson has refused to compose a soundtrack for his flick `Twilight', as he wants to keep music as a back up career.

Although The `Twilight' actor, who is a talented composer, pianist and guitarist, wrote two songs for the original flick, helping them to top the American album charts, he is not ready to do the same for the sequel.

"I really didn''t want it to look like I was trying to cash in. Music is my back up plan," Contactmusic quoted Rob, as telling OK! Magazine.