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:
 In agreement with this , archaea appear to lack eIF5 , eIF2B and the lysine - rich binding domain for these factors in their eIF2beta homolog .
answer:
eIF2beta homolog


question:
 Both genes ARO3 and ARO4 are strongly regulated under the general control regulatory system .
answer:
genes ARO3


question:
 Plasma prolactin concentrations in pinealectomized ewes receiving melatonin treatment and in pineal intact ewes maintained under a non - 24 - hour photoperiod .
answer:

Plasma prolactin