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.

 Plasma prolactin concentrations during incubation , 25 . 8 + / - 2 . 3 ng / ml , decreased to baseline levels , 10 . 8 + / - 1 . 9 ng / ml , within 24 hr after nestbox removal .
Plasma prolactin

 There was a 57 % reduction in IGF IR mRNA levels in clone CA9 after confluence compared with clone ME10 .
IGF IR mRNA

 A role for phosphatidylinositol 3 - kinase in the regulation of beta 1 integrin activity by the CD2 antigen .

beta 1 integrin