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Sequence-confirmed identity Mass-spectrometry analysis verifies the 15-amino-acid sequence matches the listed specification
Even with perfect aseptic technique, each needle passage through ambient air before entering the vial represents a contamination opportunity
Parkinsonism Relat Disord 27:8184 de Lau LML, Koudstaal PJ, Witteman JCM, Hofman A, Breteler MMB (2006) Dietary folate, vitamin B12, and vitamin B6 and the risk of Parkinson disease
Active B12 assay for diagnosing vitamin B12 deficiency (MIB40)
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