What is the test for federal habeas corpus relief for instructional error?

"[F]ederal habeas corpus relief does not lie for errors of state law." Estelle v. McGuire, 502 U.S. 62, 67 (1991). "In conducting habeas review, a federal court is limited to deciding whether a conviction violated the Constitution, laws, or treaties of the United States." Id. at 68. To obtain federal habeas relief for instructional error, a petitioner must show that the ailing instruction by itself so infected the entire trial that the resulting conviction violates due process. See id. at 72. The instruction may not be judged in artificial isolation, but must be

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