Another type is useful in signature tagged mutagenesis of Drosophila, and is called the P-element.  
One of them has a conserved gag, and is analogous to copia in Drosophila. Another of them requires att-L and att-R sites, and relies on the formation of a Holiday junction.  Both the BARE-1 type of Hordeum vulgare L. and the A and B types of the Mu phage possess constructs with U5 and U3 binding sites for tRNA, not found in LINEs and SINEs.  Another type is useful in signature tagged mutagenesis of Drosophila, and is called the P-element.  The Alu repeat is common in humans, and they are generally divided into two varieties, depending on the presence of LTRs and the use of a reverse transcriptase mechanism.  FTP name these entities responsible for the colors of corn kernels, discovered by Barbara McClintock, also known as jumping genes.
One of them has a conserved gag, and is analogous to copia in Drosophila.
{transposon}s or {transposable element}s