U1 small nuclear ribonucleoprotein A
UniProtKB accession: P43332
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Go to UniProtKB: P43332
UniProtKB description: Binds stem loop II of U1 snRNA. It is the first snRNP to interact with pre-mRNA. This interaction is required for the subsequent binding of U2 snRNP and the U4/U6/U5 tri-snRNP (By similarity). Plays a role in regulating sex-lethal splicing.
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