1507
Antibodies against the astroglia - specific cytoskeletal protein , glial fibrillary acidic protein ( GFAP ) , and against the glial calcium - binding protein , S - 100 protein , were used to assess the status of astrocytes .
 Chemical: calcium
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: calcium