7501
BoCCL3 isoform 2 , present in bovine serum at about 10 ng / ml , functioned as a most potent chemoattractant for immature ( but not mature ) dendritic cells with a minimal effective concentration of 0 . 03 ng / ml and a maximal chemotactic index of 30 at 0 . 3 ng / ml .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None