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.

Example Input:  The yeast genome contains a single ORD1 gene that resides on chromosome XI .
Example Output: ORD1 gene

Example Input:  Transient transfection assays indicated that the ( - 4551 ) UCP1 - CAT construct , containing the 5 ' - regulatory region of the rat ucp - 1 gene , was activated by PPARalpha co - transfection in a dose - dependent manner and this activation was potentiated by Wy 14 , 643 and retinoid X receptor alpha .
Example Output: retinoid X receptor

Example Input:  Serum IgM levels showed a highly significant increase in all types of brain tumour when compared to controls .
Example Output:
Serum IgM