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 contrast , a similar fusion protein ( hGH - LDLR - DAF17 , abbreviated HLD ) containing a fragment of the serine / threonine - rich domain of the LDL receptor ( LDLR ) in place of the DAF - derived serine / threonine - rich sequences , does not become GPI anchored .
[A]: LDL receptor


[Q]:  The biological activity of these mutants was tested by determining their capacity to ( i ) reconstitute RNA polymerase activity in vivo by cotransfection with proteins NP , PB1 , and PA and a virion - like RNA encoding the cat gene into vaccinia virus T7 - infected COS - 1 cells and ( ii ) complete with the wild - type PB2 activity .
[A]: RNA polymerase


[Q]:  It contains 31 exons and a high proportion of class 0 introns , alternative splicing of which results in significant levels of variant transcripts that maintain the original open reading frame of MRP mRNA .
[A]:
MRP mRNA