15505
A study has been made of the influence of two pools of caseinophosphopeptides ( CPPs ) obtained from alpha ( s ) - and beta - casein ( CN ) fractions , and of three specific CPPs ( beta - CN ( 1 - 25 ) 4P , alpha ( s1 ) - CN ( 64 - 74 ) 4P and alpha ( s2 ) - CN ( 1 - 19 ) 4P ) , on iron bioavailability ( ferritin synthesis ) and zinc bioavailability ( retention , transport and uptake of zinc ) in Caco - 2 cells .
 Chemical: iron; Chemical: zinc; Chemical: zinc
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: iron; Chemical: zinc; Chemical: zinc