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This work describes a technique for forming high - density arrays and patterns of membrane - bound proteins through binding to a curvature - organized compositional pattern of metal - chelating lipids ( Cu ( 2 + ) - DOIDA or Cu ( 2 + ) - DSIDA ) .
 Chemical: Cu ( 2 + ); Chemical: Cu ( 2 + )
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: Cu ( 2 + ); Chemical: Cu ( 2 + )