One characteristic elements in the promoter of the matrix metalloproteinase 9 (MMP-9) gene is the d(CA) repeat. To investigate whether this element regulates the transcription of the MMP-9 gene and its enzymatic activities, we sequenced the promoter region isolated from esophageal carcinoma cell lines.
T he SARS-CoV-2 variant Omicron (B.1.1.529) replaced other variants in Spain during the sixth wave, accounting for 79%-94% of positive samples in the last 2 weeks of 2021. 1 The information is scarce about Omicron severity in children.To describe the features of children with COVID-19 during the Omicron wave, we reviewed charts from children with COVID-19 attended at the emergency room of a secondary center in Spain from December 20, 2021, to January 2, 2022. All patients' charts were reviewed 1 week after diagnosis to check complications.
SUMMARY
The structure of copper phthalocyanine has been studied by high resolution transmission electron microscopy (TEM). To reduce radiation damage, the technique of minimal beam exposure has been used together with X‐ray film for recording the image. This resulted in very noisy micrographs but optical averaging clearly revealed the molecular shape of the copper phthalocyanine, and also showed that a slight discrepancy exists between the averaged image, and the model structure which had been assumed to be isomorphous with platinum phthalocyanine.
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