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This family consists of LEF-3 Nucleopolyhedrovirus lateexpression factor 3 (LEF-3) sequences which are known to be ssDNA-binding proteins [1]. Alkaline nuclease (AN) and LEF-3 may participate in homologous recombination of the baculovirus genome in a manner similar to that of exonuclease (Redalpha) and DNA-binding protein (Redbeta) of the Red-mediated homologous recombination system of bacteriophage lambda [2]. LEF-3 is essential for transporting the putative baculovirus helicase protein P143 into the nucleus where they function together during viral DNA replication [3]. LEF-3 and other proteins have been shown to bind to closely linked sites on viral chromatin in vivo, suggesting that they may form part of the baculovirus replisome [3].
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