The sigB gene of Bacillus cereus ATCC 14579 encodes the alternative sigma factor sigma(B). Deletion of sigB in B. cereus leads to hyperresistance to hydrogen peroxide. The expression of katA, which encodes one of the catalases of B. cereus, is upregulated in the sigB deletion mutant, and this may contribute to the hydrogen peroxide-resistant phenotype.

Staphylococcus aureus strains without catalase activity are rare, challenging to identify with conventional biochemical methods, and, despite a supposed decreased pathogenicity, can still cause disease. The first whole-genome sequence of a catalase-negative S. aureus isolate causing severe recurrent invasive infection with two novel missense mutations in the katA gene is reported here.

Penyair dalam menyampaikan perasaan, pemikiran, dan pengalaman ke bentuk puisi melalui berbagai jenis bahasa, tidak terkecuali Sindhunata. Tujuan penelitian ini yaitu mendeskripsikan multilingual yang terdapat pada kumpulan Air Kata karya Penelitian merupakan kualitatif dengan teknik pengumpulan dokumentasi analisis data menggunakan content analysis berupa puisi-puisi Kata. Ditemukan bahasa dig...

AbstractThis study aims to describe the form and meaning of taboo words in Kubitan Dayak language, function Kubitn references euphemisms, implementation learning. The method used this is a qualitative descriptive method. Research approach, namely ethnolinguistics. Data collection techniques are direct observation techniques, refer conversation, record take notes. This resulted 58 monomorphemic ...

The characterization of an oxyR insertion mutant provides evidences that katA, which encodes the unique H2O2-inducible HPII catalase, is regulated by OxyR not only in free-living Sinorhizobium meliloti but also in symbiotic S. meliloti. Moreover, oxyR is expressed independently of exogenous H2O2 and downregulates its own expression in S. meliloti.