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Also , by performing multiple alignments of 855 non - redundant amino acid sequences , we assessed the degree of conservation in their respective families of the amino acid residues putatively relevant for cation binding .
 Chemical: amino acid; Chemical: amino acid
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: amino acid; Chemical: amino acid