Kovacs Z et al. [11] have indicated 12 N-glycan features showed statistically significant differences among various stages of MM in comparison to the control at the serum level, while only six features were identified with similar significance at the immunoglobulin level, including the analysis of the partitioned Fc fragment as well as the Fab κ and Fab λ chains. This evidence concerns the gene FANCB and Miyoshi myopathy.