28586
Pharmacological stimulation of KCa3 . 1 unexpectedly suppressed proliferation by inhibiting the rise in [ Ca ( 2 + ) ] i and abolishing the expression and activity of KCa3 . 1 and PDGF beta - receptors .
 Ca ( 2 + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ca ( 2 + )