Human and rat prolactin and preprolactin cloned genes

A DNA which comprises a deoxynucleotide sequence coding for prolactin, particularly human prolactin, is described. A transfer vector and an expression vector containing this DNA and microorganisms transformed by these vectors are also described. A method for preparing a reverse transcript (cDNA) from a messenger RNA is also disclosed herein. The invention described herein was made in the course of, or under, a grant from the National Institutes of Health.