Figure 1 Examination of MuSK antibody levels and B-cell subsetsFlow cytometric analysis (n = 13) using standardized Human Immunology Project Consortium panels to identify (A) naive, memory, IgD−, and IgD+ B cells, along with (B) transitional B cells and (C) plasmablasts. Examination of MuSK antibody levels and B-cell subsetsFlow cytometric analysis (n = 13) using standardized Human Immunology Project Consortium panels to identify (A) naive, memory, IgD−, and IgD+ B cells, along with (B) transitional B cells and (C) plasmablasts. Plasmablasts, IgD−, and IgD+ B cells were gated from CD19+ CD27+ memory B cells. Transitional cells were gated from CD19+ cells. MuSK = muscle-specific tyrosine kinase. Jeffrey T. Guptill et al. Neurol Neuroimmunol Neuroinflamm 2015;2:e77 © 2015 American Academy of Neurology