blood interleukin amount blood interleukin-6 amount circulating myeloid differentiation-inducing protein level circulating B-cell stimulatory factor 2 level circulating IFN-beta 2 level circulating IL6 level circulating interleukin-6 level EFO:0004810 circulating B-cell differentiation factor level circulating IL-6 level The proportion, quantity, or volume in whole blood, serum, or plasma of a cytokine that stimulates the growth and differentiation of B-cells and is also a growth factor for hybridomas and plasmacytomas, and is produced by many different cells including T-cells, monocytes and fibroblasts. CMO:0001927 circulating hybridoma growth factor level circulating B-cell stimulatory factor-2 level Trait.ontology circulating MGI-2 level circulating hepatocyte-stimulating factor level VT:0008595 circulating BSF-2 level circulating B-cell differentiation factor-2 level interleukin-6 measurement circulating plasmacytoma growth factor level circulating B cell stimulatory factor-2 level acute phase protein amount