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Clustal W multiple sequence alignments of DNA invertase (DNA INV) from plasmid pRYCE21 with related phage DNA invertases: Pin DNA invertase from lambdoid prophage (23), PinH DNA invertase from prophage CP-933H (27), Cin from Enterobacteriaceae phages P1 and P7 (14, 26), and Gin from Enterobacteriaceae phage Mu (22).
