24433
The structures of the chromophore binding pockets in the Pfr states of various bathy and prototypical biliverdin - binding phytochromes were analysed by using a combined spectroscopic - theoretical approach .
 Chemical: biliverdin
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: biliverdin