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.

[Q]:  In this study , we obtained PBL from Epstein - Barr virus ( EBV ) IgG antibody positive kidney transplant recipients ( R ) and their living - related donors ( LRD ) one year after renal transplantation .
[A]: IgG antibody


[Q]:  Retinoic acid up - regulates myeloid ICAM - 3 expression and function in a cell - specific fashion - - evidence for retinoid signaling pathways in the mast cell lineage .
[A]: ICAM - 3


[Q]:  Although the enhanced NK cell activity and LDCC were closely associated with high levels ( greater than 31 fmol / mg ) of estrogen receptor ( ER ) content in the primary tumor , no other clinical or histologic correlation between the increase in either parameter of cytotoxic effector cell function could be found .
[A]:
estrogen receptor