Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: The nucleotide sequence of the unique region of coronavirus MHV-A59 mRNA 2 has been determined. Two open reading frames (ORF) are predicted: ORFl potentially encodes a protein of 261 amino acids; its amino acid sequence contains elements which indicate nucleotide binding properties. ORF2 predicts a 413 amino acids protein; it lacks a translation initiation codon and is therefore probably a pseudogene. The amino acid sequence of ORF2 shares 300/o homology with the HA1 hemagglutinin sequence of influenza C virus. A short stretch of nucleotides immediately upstream of ORF2 shares 83O/0 homology with the MHC class I nucleotide sequences. We discuss the possibilitythat both similarities are the result of recombinations and present a model for the acquisition and the subsequent inactivation of ORF2; the model applies also to MHV-A59-related coronaviruses in which we expect ORF2 to be still functional.

Sequence of Mouse Hepatitis Virus A59 mRNA 2: Indications for RNA Recombination between Coronaviruses and Influenza C Virus