23373
Calcium - dependent protein kinases ( CDPK ) , which transduce these signals , are conserved among apicomplexans but absent from mammalian hosts , making them attractive targets for therapeutic intervention .
 Chemical: Calcium
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: Calcium