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BACKGROUND Clustered Regularly Interspaced Palindromic Repeats (CRISPRs) are a novel type of direct repeat found in a wide range of bacteria and archaea. CRISPRs are beginning to attract attention because of their proposed mechanism; that is, defending their hosts against invading extrachromosomal elements such as viruses. Existing repeat detection tools do(More)
INTRODUCTION The relationship between Professional Development and Support Models on the Work and Retention of Secondary Mathematics Teachers merits careful examination. National reports identify the need to increase the pool of highly qualified mathematics teachers to improve mathematics education and maintain the United States' economic competitiveness(More)
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