DNA complementary to parathyroid mRNA directs synthesis of pre-proparathyroid hormone in a linked transcription—translation system

DNA complementary in sequence to the messenger RNA for pre-proparathyroid hormone was synthesised using reverse transcriptase. In a linked transcription–translation system using RNA polymerase and cell-free extract from wheat germ, the DNA directed the synthesis of a protein identified as pre-proparathyroid hormone by N-terminal Sequencing and by electrophoretic and immunologic criteria.