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As the dominant G-actin sequestering protein in mammalian cells, TB-500 binds globular actin with high affinity (Kd ~0.5 M) through a sophisticated triple-contact mechanism involving Lys-3, Lys-18, and Lys-38 residues, preventing spontaneous actin polymerization while maintaining a readily mobilizable reservoir for rapid cytoskeletal reorganization

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Unlike iron-deficiency anaemia (which is common in pregnancy), B12 deficiency typically presents with a raised mean corpuscular volume (MCV) on full blood count testing

DOI: 10.1016/j.ejpb.2013.09.008

And yes, using expired semaglutide is a question that comes up regularly, with important implications for both safety and efficacy