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:  Restriction mapping showed that the two recombinant plasmids shared an EcoRI fragment of 8 . 9 kb .

A: EcoRI fragment
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Q:  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 .

A: animal H1 histones
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Q:  The NF1 family members and HNF4 interacted with overlapping sequences of the L - II element , wherein the 5 ' half - site was more critical for NF1 binding , and the 3 ' site was more important for HNF4 binding .

A:
NF1 family
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