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ESE motifs in 4.5S RNA. The sequences of 4.5S RNA I from Novikoff hepatoma cell nuclei were screened by ESE finder 3 [13] for ESE, 5′ splice sites, branch sites, and 3′ splice sites. The default threshold value was used. There were 4 SF2/ASF sites, 3 SC35 sites, 6 SRp40 sites, 1 SRp55 sites, 10 branch sites, and 2 3′ splice sites. These numbers resemble the number identified in Alu elements of human FMR1 transcript (Table 8).
