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.

We suggest that the responses to types I and II collagen were caused by a cross - reaction with type III collagen peptides .
type III collagen

DNA elements recognizing NF - Y and Sp1 regulate the human multidrug - resistance gene promoter .
NF - Y

BACKGROUND : Peripheral kappa receptor agonists may provide a new therapeutic approach for the treatment of functional dyspepsia .
kappa receptor