16102
cAMP response element - binding protein ( CREB ) has been implicated in the regulation of FSH beta gene expression , but the molecular mechanisms by which pulsatile GnRH regulates CREB activation remain poorly understood .
 Chemical: cAMP; Chemical: GnRH
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cAMP; Chemical: GnRH