24437
The Pfr states of prototypical phytochromes , thoroughly studied for Agp1 ( A . tumefaciens ) , display conformational equilibria between two sub - states differing with respect to the CD methine bridge torsional angle and the AB methine bridge geometry .
 Chemical: methine; Chemical: methine
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: methine; Chemical: methine