Jxle Vintage masterpiece: Queen s fountain: Exploring the riches of the past
Researchers have discovered the atomic structure of a powerful "molecular motor" that packages DNA into the head segment of some viruses during their assembly, an essential step in their ability to multi
converse allstar ply and infect new host organisms.The researchers, from Purdue University and The Catholic University of America, also have
air force1 proposed a mechanism for how the motor works. Parts of the motor move in sequence like the pistons in a car's engine, progressively drawing the genetic material into the virus's head, or capsid, said Michael Rossmann, Purdue's Hanley Distinguished Professor of Biological Sciences.The motor is needed to insert DNA into the capsid of the T4 virus, which is called a bacteriophage because it infects bacteria. The same kind of motor, however, also is likely present in other viruses, including the human herpes virus."Molecular motors in double-stranded DNA viruses have never been shown
new balance f眉r herren in such detail before," said Siyang Sun, a postdoctoral research associate working in WASHINGTON:A group of US lawmakers said
adidas campus wei脽 on Monday they had requested more information from President Donald Trump's administration about the potential sale of precision-guided munitions to Saudi Arabia, expressing concern about civilian casualties in Riyadh's campaign in Yemen that delayed the deal last year.Thirty mostly Democratic
nb balance lawmakers signed the letter to US Secretary of State, Rex Tillerson, and Secretary of Defense, James Mattis, citing expectations that the administration plans to go ahead with the sale.US approves sale of night vision military system to Pakistan"As you know, the previous administration made the decision in December 2016 to halt a planned sale of precision-guided munitions (PGM) to Saudi Arabia due to concerns over widespread civilian casualties and significant deficiencies in RSAF's (the Saudi Air Force's) targeting capabilities," the letter, dated Friday but released on Monday, said."Accord
samba adidas ing to recent reports, however, the State Department has now revers