Whereas most people have a sequence called BRCA1, which helps to suppress tumours, some people are born with a faulty version of it, so tumours go unchecked.
While health officials caution that there are no indications the virus can be transmitted from one person to another, scientists who have studied its genetic sequence said this week that the virus may have recently mutated into a form that spreads more easily to other animals, potentially posing a bigger threat to humans.
There seems to have been a sequence of technical faults (reportedly, a problematic transformer, false alarms, failed signals and an apparent power surge) at about the same time in a small area of the power grid serving London.
In Egypt, by design, the military and the Islamist Brotherhood have reversed the sequence and were intent against the desires and the requests of the revolutionaries and many secularists, politicians, right from the beginning, right from February, to start with a decent constitution and they reversed the sequence to start with elections.
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While the loss to Birmingham was hardly the performance of a team in crisis, and the Blues are now through to the last 16 of the Champions League, this indifferent sequence would have been worrying for manager Carlo Ancelotti, underlying as it did the lack of strength in depth in a squad that used to be renowned for it.
Samuel Fuller, who was a novelist as well as movie director, used to write up these big storyboards, not necessarily with ideas, but he would have this different - the sequence of scenes in different colors: red for a romantic scene, blue for an action sequence - and try to vary his pace that way.
As a playable post-game credit sequence, it could have been a well-executed retelling of the journey.
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In recent weeks, voters have watched with mounting incredulity a sequence of ever more brazen, ever more desperate and ever more counter-productive attempts to do so.
It is awkward for Mr Blair to be seeing the president at the end of the sequence as he would have less chance of influencing any decisions.
When darkness enveloped the Leopard Creek golf course and the action was abandoned at 1825 local time, 21 golfers were still to finish their rounds, and for the second day in succession play will have to be completed out of sequence on the following morning.
Venter and his partner in technology, Tony White, need to sell a lot more of it if they are to have any hope of translating that gene sequence into useful medical products.
It takes a lot of 600s to fit into 3 billion, and in practice it takes many more than that to make a full sequence because the individual fragments have to be linked together by matching up their overlaps.
Another key difference to the current sequence is that the two props have to touch their opposition number's shoulder.
So if you have cobbled together many out-of-sequence events on tape or film, they'll appear that way in your digital vault.
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The scientists say they have found a way of interrupting the chemical sequence of events which leads to apoptosis of oocytes.
Defending champions Chelsea have already lost six times this season and looked to have fallen out of contention after a dismal sequence of one win in nine games.
Photos show the trim tab departing the plane six seconds into the accident sequence, meaning the break may have been a result of the mishap, not its cause.
Both rely on having a protein's amino-acid sequence in the bag, and both have strengths and weaknesses.
"The sequence of landers was strategically planned to have ever-increasing capability to go forward and do more, " he said.
But no film-school formula could have envisioned the quietly magical pull of this film's opening sequence.
But since the first draft sequence of the human genome was released in 2000, scientists have realized that junk DNA plays a key role in switching genes on and off.
Naturally, you have to do some work to examine exactly who those extremists are and what the sequence of events were.
The sequence is both laughably artificial and entirely convincing, a manipulation that may have been motivated by commercial demands but becomes an opportunity for existential exploration.
" Saving Private Ryan " (DreamWorks ): Whatever reservations one may have about Steven Spielberg's movie as a whole, the first long battle sequence is masterly filmmaking that can be studied in shocking detail on this impeccably produced disk.
The sequence led to the inevitable question: Did the referees' calls against Ovechkin have anything to do with his pregame comments.
The sequence mixes vainglory and tragedy, and it makes us think that Spielberg could have made a great First World War movie.
There have been calls for a clearer sense of chronology to improve children's understanding of the sequence of historical eras and events.
The cost of sequencing has plummeted over the past decade, and several technologies have emerged, each backed by different firms which will, for a suitable consideration, happily sequence your genome.
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By looking for overlaps between these fragments and fitting the resulting contiguous sequences to reference sequences from humans and Neanderthals the team were able to come up with a DNA sequence for most of the mitochondrion, and it was nothing like one that would have been expected from either a modern human or a Neanderthal.
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