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Each amino acid's building blocks share a common backbone structure with a central carbon atom, an amino group (-NH), a carboxyl group (-COOH), and a hydrogen atom
Fraternale et al., 2017), as well as conferring protection against oxidative stress caused by microbial, parasitic and viral infections such as SARS-CoV-2 that causes COVID-19 disease (Morris et al., 2013
Capillary endothelial cell
3 (September 9, 2016)
Figure 1 2 Basic concepts and pathological mechanisms of COPD 2.1 Definition and classification of COPD COPD is defined as a common, preventable, and treatable disease characterized by persistent respiratory symptoms and airflow limitation due to airway and/or alveolar abnormalities, usually caused by significant exposure to noxious particles or gases (13)
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