24602
In contrast , synaptotagmin - 1 - deficient cells - and cells where transgenically encoded synaptotagmin - 1 was acutely photo - inactivated - were devoid of any Ca ( 2 + ) / H ( + ) - antiport activity .
 Chemical: Ca ( 2 + ); Chemical: H ( + )
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 + ); Chemical: H ( + )