1880
Our study is the first to our knowledge to reveal the requirement of Ano6 in PS scrambling in osteoblasts , supporting a function of PS exposure in the deposition of hydroxyapatite .
 Chemical: hydroxyapatite
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: hydroxyapatite