14802
This study used a high titer anti-38,000-M(r) serum to screen bacteriophage lambda cDNA expression libraries and identified human islet and placental clones encoding jun-B , the nuclear transcription protein , of predicted 38,000 M(r).
 nuclear transcription protein, placental clones, jun-B, bacteriophage lambda cDNA, human islet
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:
 nuclear transcription protein, placental clones, jun-B, bacteriophage lambda cDNA, human islet