3875
Northern analysis using a probe encompassing a common region of both isoforms showed two mRNA species of 2.7 and 4.5 kilobase pairs , while an NFATc.beta -specific probe detected only the 4.5-kilobase pair mRNA which was preferentially expressed in the spleen.
 ( RNA: mRNA species, None) , ( RNA: 4.5-kilobase pair mRNA, None) , ( DNA: NFATc.beta -specific probe, None) , ( protein: NFATc.beta, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( RNA: mRNA species, None) , ( RNA: 4.5-kilobase pair mRNA, None) , ( DNA: NFATc.beta -specific probe, None) , ( protein: NFATc.beta, None) 