25648
We argue that CP29 proteins previously studied by HB spectroscopy lacked at least one Chl a molecule ( i . e . , a615 or a611 ) , which along with Chl a612 contribute to the lowest energy state in more intact CP29 , and one Chl b ( most likely b607 ) .
 Chemical: Chl a; Chemical: Chl b
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: Chl a; Chemical: Chl b