1547
An alkylation procedure is described , allowing efficient derivatization ( greater than 90 % ) of cysteines and cystines even in low microgram quantities , as revealed by test analyses with lysozyme and a hydrophobic membrane protein .
 Anatomy: membrane
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: membrane