501
Southwestern and gel renaturation experiments with the use of purified protein fractions revealed that TCF-1 alpha activity is derived from a family of 57- to 53-kD proteins that are abundantly expressed in mature and immature T-cell lines ( Jurkat , CCRF-CEM ) and not in mature B cells ( JY , Namalwa ) or nonlymphoid (HeLa) cell lines .
 cell line: CCRF-CEM; protein: TCF-1 alpha; cell line: nonlymphoid (HeLa) cell lines; cell line: mature B cells; cell line: JY; cell line: Namalwa; protein: 57- to 53-kD proteins; cell line: Jurkat
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:
 cell line: CCRF-CEM; protein: TCF-1 alpha; cell line: nonlymphoid (HeLa) cell lines; cell line: mature B cells; cell line: JY; cell line: Namalwa; protein: 57- to 53-kD proteins; cell line: Jurkat