Under a complex system, two-thirds of the 498 elected lower house seats go proportionately to party lists, with the rest going to individual candidates, who must win more than 50 percent of votes in the first round to avoid a run-off.Only four seats were won outright in the first round, leaving 52 to be decided in run-off voting on Monday and Tuesday, with 24 of them contested between the FJP and Nour.The Brotherhood, Egypt's best-organized political group and popular with the poor for its charity work, wants to shape a new constitution to be drawn up next year.That could be the focus of a power struggle with the ruling military council, which wants to keep a presidential system, rather than the parliamentary one favored by the Brotherhood.Figures released by the election committee show a list led by the FJP securing 36.6 percent of valid party-list votes in last week's polls, followed by Nour's Salafi list with 24.4 percent, and the liberal Egyptian Bloc with 13.4 percent.The result has unnerved Israel, concerned about the fate of its 1979 peace treaty with Egypt. Prime Minister Benjamin Netanyahu called on Egypt's future rulers to preserve the deal."We hope any future government in Egypt will recognize the importance of keeping the peace treaty with Israel in its own right and as a basis for regional security and economic stability," Netanyahu said on Sunday.The future of the peace deal between Egypt and Israel is a concern for its sponsor, the United States, which has backed it with billions of dollars in military aid for both countries. The rise of the Salafis has sparked fear among many ordinary Egyptians because of their uncompromising insistence that strict sharia (Islamic law) should govern all aspects of society.The more pragmatic Brotherhood appears unlikely to ally with Salafis who only recently ventured from preaching into politics."The Salafis are abiding by sharia... while the Brotherhood play politics," said Amin Ibrahim, 38, a print worker voting in Alexandria, regarded as a stronghold of Islamists.Nour Party leader Emad Abdel Ghaffour made it clear he would not play second fiddle to the Brotherhood."We hate being followers," Ghaffour told Reuters in an interview. "They always say we take positions according to the Brotherhood but we have our own vision... There might be a consensus but... we will remain independent."Voting got off to a slow start in Cairo, Alexandria and Port Said, in contrast to the early queues at polling stations in last week's election, when officials put turnout at 52 percent, although authorities had said earlier that turnout was 62%.