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]:  To study B cell - specific changes that occur during the aging process , we investigated expression patterns of Pax - 5a and 5d in mature B cells of young and aged mice .
[A]: Pax - 5a


[Q]:  The carboxy terminus of LMP1 is also a reliable marker for individual EBV strain identification and thus offers new possibilities in tracing the molecular events leading to posttransplant lymphoproliferative disorders ( PTLDs ) .
[A]: carboxy terminus


[Q]:  Hypoxia down - regulates MCP - 1 expression : implications for macrophage distribution in tumors .
[A]:
MCP - 1