You will be presented with a citation segment from the section of a research paper. Classify the intent behind this citation by choosing from one of the following categories:

- Method: Cites the paper for its methodology or procedure.
- Background: Cites the paper to provide background information.
- Result: Cites the paper for its findings or results.

Your answer should be a single word from the following list of options: ["Method", "Background", "Result"]. Do not include any other text in your response.

Citation sentence:

To disrupt sdb1, corresponding fragments of the sdb1 gene were amplified with primers DX1/DX2 and DX3/DX4, and then subcloned into the temperature-sensitive vector pSET5s (Takamatsu et al., 2001a), resulting in the vector pDX.
Method