PRL and Huntington disease: In addition, RR of small solutes and various MM, including prolactin (23 kDa), alpha1-microglobulin (30 kDa), VEGF (43 kDa), and kappa (22 kDa) and lambda (45 kDa) FLC, also involved in morbidity and mortality of HD patients [2, 3], were comparable.