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 enveloped baculoviras\insect cell system has been used extensively for expression of recombinant proteins, including viral fusion proteins. We tested wiid-tyl~ baculovirus for endogenous fusion protein activity. Syncytia formation, dye transfer, and capacitance chanses were observed after incubating infected Spodopterafrugiperda cells in acidic media, consistent with fusion protein activity. Only a short acidic pulse of 10 s is needed to trisect syncytia formation. Identical results were obtained with recombinant baculovirus. This new ~ys:e,r~ !,_ convenient for studying pH activated ccll~dl fusion. However, using this enveloped virus to study ~he mechanism of recomlHzant fusion proteins rexluires caution. Membrane fusion; Viral fusion; Enveloped virus; Cell-cell fusion; Baculovirus exprer~ion system Published by Elsevier Science Publishers B. It. 92] Volume 304, number 2,3 FEBS LETTERS

Acidic pH induces fusion of cells infected with baculovirus to form syncytia