Genetically engineered proinsulin constitutively processed and secreted as mature, active insulin.

Abstract excerpt

The conversion of human proinsulin to insulin occurs only in specialized cells which contain the appropriate processing enzymes. To allow proinsulin processing to occur in a wide variety of cell types, we engineered human proinsulin to be cleaved in the constitutive secretory pathway. Using site-directed mutagenesis, we have introduced furin consensus cleavage sequences (Arg-X-Lys-Arg) into the human proinsulin...

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