1285
The protein and mRNA contents of chains alpha 1 ( IV ) , alpha 3 ( IV ) and alpha 4 ( IV ) increased ; those of chains alpha 2 ( IV ) and alpha 5 ( IV ) remained unchanged ; and the protein and mRNA contents of laminin chains alpha 5 , beta 1 and gamma 1 decreased .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None