16228
Using in vitro osteoclast culture systems , we show here that Tmem64 interacts with sarcoplasmic endoplasmic reticulum Ca ( 2 + ) ATPase 2 ( SERCA2 ) and modulates its activity .
 Chemical: Ca ( 2 + )
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: Ca ( 2 + )