2760
The procedure is based on the use of a central skeleton of uteroglobin , a small and very soluble covalently linked homodimeric protein that is very resistant to proteolytic enzymes and to pH variations .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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