Transposition replicative

Encodes subunit of integration host factor (IHF), involved in site-specific recombination, replication, transposition, regulation of gene expression Required for recombinational repair... 

Molecular parasites may also have originated in an RNA world. With the appearance of the first inefficient self-replicators, transposition could have been a potentially important alternative to replication as a strategy for successful reproduction and survival. Early parasitic RNAs would simply hop into a self-replicating molecule via catalyzed transesterification, then passively undergo replication. Natural selection would have driven transposition to become site-specific, targeting sequences that did not interfere with the catalytic activities of the... 

In replicative transposition, a replicated copy of a transposable element is inserted into a new chromosome location in a process that involves the formation of an intermediate called a cointegrate. In nonreplicative transposition, sequence replication does not occur, that is, the transposable element is spliced out of its donor site and inserted into the target site. The donor site must be repaired. 

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