instruction:
In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
question:
 The atopic disposition , indicated by positive skin reactions and IgE antibody titers etc . , and the bronchial reactivity to inhaled acetylcholine were examined on the following three groups : ( 1 ) 20 young adults with a history of childhood asthma who have been symptom - free for more than 4 yr ; ( 2 ) 20 current asthmatics , and ( 3 ) 20 healthy young adults .
answer:
IgE antibody


question:
 We have isolated a unique murine FLT3 cDNA that codes for a variant isoform of FLT3 , devoid of the fifth Ig - like domain , by comparison with the prototypic form .
answer:
murine FLT3 cDNA


question:
 Human parvovirus B19 gene expression from the viral p6 promoter ( B19p6 ) is restricted to primary human hematopoietic cells undergoing erythroid differentiation .
answer:

viral p6 promoter