RARRES2 and obesity due to melanocortin 4 receptor deficiency: Third, we investigate the effects of fasting and high fat diet-induced obesity on plasma chemerin levels and chemerin gene (RRARES2) mRNA content in adipose tissue, comparing for the first time the effects of diet-induced obesity on plasma chemerin levels in C56Bl/6 and FVB mice, the latter being relatively resistant to obesity.