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.

[EX Q]:  In addition , mrp17 - 1 , in combination with some mutations affecting another mitochondrial ribosomal protein , caused a synthetic defective phenotype .
[EX A]: mrp17 - 1

[EX Q]:  Legionella antibodies in domestic animals
[EX A]: Legionella antibodies

[EX Q]:  A selective transcriptional induction system for mammalian cells based on Gal4 - estrogen receptor fusion proteins .
[EX A]:
estrogen receptor