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All felt it was a gallant battle , and the man a great fighter ; and now when he is dead , and the war seems to have gone against him , many can scarce remember , without a kind of regret , how much devotion and audacity have been spent in vain . The amino acid sequence palindromes of region AG are a different form of symmetry than a direct repeat . The explanation , said Mr. Leonard , the head of the office , is a bureaucratic quirk . This would be a future extension to fragment programs . This contrasts with other operating systems like Mac OS X or Microsoft Windows , where a virtual desktop tool is a third-party add-on that users must locate , buy and install themselves .