TASK DEFINITION: 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.
PROBLEM:  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 .

SOLUTION: IgE antibody

PROBLEM:  Long - range mapping by pulse - field gel electrophoresis indicated that the three mdr genes are closely linked on a genomic DNA segment of approximately 625 kilobases .

SOLUTION: mdr genes

PROBLEM:  However , electron microscopy revealed that while sec4 mutant cells accumulate secretory vesicles , ypt31 / 32 mutant cells accumulate aberrant Golgi structures .

SOLUTION:
sec4 mutant