PMID 3470784 1987 A mutation in the B chain coding region is associated with impaired proinsulin conversion in a family with hyperproinsulinemia.
PMID 4019786 1985 Posttranslational cleavage of proinsulin is blocked by a point mutation in familial hyperproinsulinemia.
PMID 2196279 1990 Two unrelated patients with familial hyperproinsulinemia due to a mutation substituting histidine for arginine at position 65 in the proinsulin molecule: identification of the mutation by direct sequencing of genomic deoxyribonucleic acid amplified by polymerase chain reaction.