3874
alpha in the first NH2-terminal 29 residues and contains an additional region of 142 residues at the COOH terminus .
 142 residues, NH2-terminal 29 residues, COOH terminus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 142 residues, NH2-terminal 29 residues, COOH terminus