POU1F1 Transcription factor involved in the specification of the lactotrope, somatotrope, and thyrotrope phenotypes in the developing anterior pituitary. Activates growth hormone and prolactin genes. Specifically binds to the consensus sequence 5'- TAAAT-3'. PIT1_SHEEP Pituitary-specific positive transcription factor 1 PIT-1 MSCQPFTSTDTFIPLNSESSATLPLIMHPSAAECLPVSNHATNVMSTATGLHYSVPSCHYGNQSSTYGVMAGSLTPCLYEFPDHTLSHGFPPMHQPLLSEDPTAADFKQELRRKSKLIEEPIDMDSPEIRELEKFANEFKVRRIKLGYTQTNVGEALAAVHGSEFSQTTICRFENLQLSFKNACKLKAILFKWLEEAEQVGALYNEKVGANERKRKRRTTISIAAKDALERHFGEQNKPSSQEILRMAEELNLEKEVVRVWFCNRRQREKRVKTSLNQSLFPNSKEHLECR PIT1 291 Growth hormone factor 1