18826
Mechanisms of interaction comprise an upstream crosstalk at the level of pathway - activating ligands and their receptors , interrelations of cytosolic kinases involved in either pathways , as well as interaction in the nucleus related to the joint regulation of target gene transcription .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None