Interleukin 6, Serum Level of, Quantitative Trait Locus, also known as il6, serum level of, quantitative trait locus, is related to soluble interleukin-6 receptor, serum level of, quantitative trait locus and myeloma, multiple. An important gene associated with Interleukin 6, Serum Level of, Quantitative Trait Locus is IL6R (Interleukin 6 Receptor). Affiliated tissues include spinal cord and uterus.