1195
Palombella and colleagues (Palombella, V.J., Rando, O.J., Goldberg, A.L., and Maniatis, T.(1994) Cell 78, 773-785) have shown that ubiquitin is required for the processing in a cell-free system of a truncated, artificially constructed, 60-kDa precursor .
 protein: 60-kDa precursor; protein: ubiquitin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: 60-kDa precursor; protein: ubiquitin