Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Q: Context: Human erythrocyte spectrin is an antiparallel heterodimer comprised of a 280 kDa alpha subunit and a 246 kDa beta subunit which further associates into tetramers in the red cell membrane cytoskeleton. Lateral association of the flexible rodlike monomers involves a multiple-step process that is initiated by a high affinity association near the actin-binding end of the molecule (dimer nucleation site). In this study, recombinant alpha and beta proteins comprising two or four "spectrin type" motifs with and without adjacent, terminal nonhomologous domains were evaluated for their relative contributions to dimer initiation, and the thermodynamic properties of these heterodimer complexes were measured. Sedimentation equilibrium studies showed that in the absence of the heterologous subunit, individual recombinant proteins formed weak homodimers (K(d) > 0.3 mM). When 2-motif (alpha20-21 and beta1-2) and 4-motif (alpha18-21 and beta1-4) recombinants lacking the terminal nonhomologous domains were paired with the complementary protein, high affinity heterodimers were formed in sedimentation equilibrium analysis. Both the alpha20-21/beta1-2 complex and the alpha20-21EF/betaABD1-2 complex showed stoichiometric binding with similar binding affinities (K(d) approximately 10 nM) using isothermal titration calorimetry. The alpha20-21/beta1-2 complex showed an enthalpy of -10 kcal/mol, while the alpha20-21EF/betaABD1-2 complex showed an enthalpy of -13 kcal/mol. Pull-down assays using alpha spectrin GST fusion proteins showed strong associations between all heterodimer complexes in physiological buffer, but all heterodimer complexes were destabilized by the presence of Triton X-100 and other detergents. Complexes lacking the nonhomologous domains were destabilized to a greater extent than complexes that included the nonhomologous domains. The detergent effect appears to be responsible for the apparent essential role of the nonhomologous domains in prior reports. Taken together, our results indicate that the terminal nonhomologous domains do not contribute to dimer initiation nor are they required for formation of high affinity spectrin heterodimers in physiological buffers. 
 Question: Alpha-spectrin and beta-spectrin subunits form parallel or antiparallel heterodimers?

A: antiparallel
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Q: Context: Queen of the Summer Stars is a 1991 novel by Persia Woolley and is the second volume of the Guinevere trilogy that relate the Arthurian legend from the perspective of Guinevere. 
 Question: What is the series that Queen of the Summer Stars is a part of?

A: guinevere trilogy
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Q: Context: Hoping to rebound from a tough loss to the Patriots, the Bills would play their Week 2 home opener in an interconference duel with the Tampa Bay Buccaneers. This would be the first time that Buffalo ever hosted Tampa Bay in a regular season game, having played a preseason game with each other in 1977. In the first quarter, the Bills came out firing as quarterback Trent Edwards completed a 32-yard touchdown pass to wide receiver Lee Evans, safety Donte Whitner returning an interception 76 yards for a touchdown and kicker Rian Lindell making a 31-yard field goal. The Buccaneers would get on the board in the second quarter as quarterback Byron Leftwich completed a 42-yard touchdown pass to tight end Kellen Winslow, while Buffalo replied with Lindell getting a 43-yard field goal. Tampa Bay would close out the half as Leftwich completed an 8-yard touchdown pass to running back Carnell "Cadillac" Williams. After a scoreless third quarter, the Bills began to pull away as Lindell got a 43-yard field goal and Edwards completed a 43-yard touchdown pass to wide receiver Terrell Owens. The Buccaneers tried to rally as Leftwich completed a 6-yard touchdown pass to tight end Jerramy Stevens (with a failed two-point conversion), yet Buffalo closed out the game with Lindell nailing a 20-yard field goal. With the win, the Bills improved to 1-1. 
 Question: Who won against the Bills before this game?

A:
patriots
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