We identified elevated TCN2 expression in individuals with SLE through the analysis of public available microarray datasets (GSE72509 and GSE112087) and our RNA-seq analysis (Figures 1A, B) (22), while vitamin B12 transporter TCN1 of the same family was not (Supplementary Figure 2) (16). This evidence concerns the gene TCN1 and systemic lupus erythematosus.