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.

Ex Input:
 In the studies described in this report , we have identified two potential Ets binding sites , EBS1 and EBS2 , which are conserved in both the human and murine interleukin - 2 enhancers .

Ex Output:
interleukin - 2


Ex Input:
 The encoded 260 - amino - acid ( aa ) ( H1 - I ) and 240 - aa ( H1 - II ) polypeptides possess the typical tripartite organization of animal H1 histones , with variable N - and C - terminal domains flanking a conserved ' globular ' DNA - binding domain .

Ex Output:
animal H1 histones


Ex Input:
 We have determined the molecular organization and transcription start points ( tsp ) for the murine gene ( TK ) encoding thymidine kinase .

Ex Output:

thymidine kinase