.. _crossref_sequence_1361: == U1 == U1 appears in 2 plasmids under 1 name. - **U1** - :doc:`pKG3944: pTET221pMXS-GIB-Cre-C-WPRE ` - :doc:`pKG3943: pTET220pMXS-GIB-Cre-N-WPRE `