Normal methylmalonic acid and homocysteine concentrations exclude vitamin B12 deficiency
Nature 459 , 945949 (2009)
[DOI] [PubMed] [Google Scholar] 45.Coco-Bassey S.B., Asemota E.A., Okoroiwu H.U., Etura J.E., Efiong E.E., Inyang I.J., Uko E.K
Anti-citrullinated protein Abs are common in patients with RA, can be of the IgM or IgA isotype, and serve as a serological diagnostic marker [210,211,212,213,214]
Samples were separated using a Raptor HILIC-Si 2.1 100 mm, 2.7 m LC column (Restek) with a constant flow rate of 400 l/min following a flow gradient starting at 5% Mobile Phase B (H 2 O + 5 mM AmFm +0.5% formic acid) then going up to 40% in 5 min, which was followed by re-equilibration at 5% B for 4 min and 30s