Like LAMR1 expression on monocytes, the proportions of LAMR1 expressing B cells in healthy individuals were measurably higher (31.5 ± 3.5% of all B cells) than those found in patients with RA (25.9 ± 3.8% of all B cells), although this was not statistically significant (p = 0.28; Fig. 2C). Here, RPSA is linked to rheumatoid arthritis.