Hobart M J, Joysey V, Lachmann P J
J Immunogenet. 1978 Jun;5(3):157-63. doi: 10.1111/j.1744-313x.1978.tb00641.x.
Three structural forms of C7 have been distinguished by isoelectric focusing. They are the products of three co-dominantly expressed alleles at an autosomal locus. The C7 locus is close to that for C6, but is not close to the HLA complex.