The hypothesis is testable and can be further challenged by, for example, mutations at putative sites of interaction between α and β subunits, and by further scrutiny through higher resolution studies.
They demand more from all students and provide further challenge for those aiming to achieve top grades," Gove said.
Explaining it all to the public, he said, will be a further challenge for regulators and automakers.
I enjoyed Scott Atkinson's Friday offering very much, but set a further challenge for myself today by doing the puzzle mostly from the Across clues.
This momentum is likely to intensify now that Mubarak is gone, and three emerging factors are transforming water dynamics in the Nile basin and bringing further challenges for Egypt.
The "new scandal (already awarded the unimaginative name of 'Glaciergate') raises further challenges for a scientific theory that is steadily losing credibility," James Heiser wrote on the Web site of the right-wing magazine New American.
A further challenge for Portugal is that its banks, which have been shut out of the markets over the past year, need to raise additional money by the end of April to comply with stricter capital requirements.
MADRID — Catalonia, Spain's northeastern region, is set to be led by a government demanding greater fiscal autonomy from Madrid, adding a further challenge for José Luis Rodríguez Zapatero, the country's embattled Socialist prime minister.
A further challenge for the House approach to housing finance reform is to avoid inadvertently recreating the implicit guarantee of the previous system, under which policy makers provided a retroactive guarantee when the crisis hit.
"It's not unreasonable to think that this is going to provide some further challenges for them, both in terms of implementing a third version of it and in terms of ensuring taxpayers' compliance," said James R. White, director of tax issues for the Government Accountability Office.
