7821
Decreased homocysteine in liver and plasma may be attributable to the decrease in hepatic methionine and upregulation of hepatic betaine homocysteine methyltransferase .
 Chemical: homocysteine; Chemical: methionine; Chemical: homocysteine
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: homocysteine; Chemical: methionine; Chemical: homocysteine