Intein
An intein is a segment of a protein that is able to excise itself and join the remaining portions (the exteins) with a peptide bond in a process termed protein splicing. Inteins have also been called "protein introns".
Intein-mediated protein splicing occurs after the intein-containing mRNA has been translated into a protein. This precursor protein contains three segments — an N-extein followed by the intein followed by a C-extein. After splicing has taken place, the resulting protein contains the N-extein linked to the C-extein; this splicing product is also termed an extein.
History
The first intein was discovered in 1988 through sequence comparison between the Neurospora crassa and carrotvacuolar ATPase (without intein) and the homologous gene in yeast (with intein) that was first described as a putative calcium ion transporter. In 1990 Hirata et al. demonstrated that the extra sequence in the yeast gene was transcribed into mRNA and removed itself from the host protein only after translation. Since then, inteins have been found in all three domains of life (eukaryotes, bacteria, and archaea) and in viruses.
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Pero no te voy a detener
by: IntensoPero no te voy a detener.....
No es justo que quieras dejarme,
mi vida no podre yo ser feliz
que fue un capricho enamorarme
y es mejor que olvidemos
lo que entre tu y yo paso.
Si nunca fui con quien soñabas
entonces para que fingiste amor,
no sabes que me mandas al infierno con tu adios
y no estoy preparado
para un golpe al conrazón.
Pero no te voy a detener
aunque me duela el alma,
por que nada viene a detenerte
si ya no me amas,
te perdono el daño que me haces
que te vaya bien,
pero que logre olvidarte un dia
no se si podre.
Pero no te voy a detener
ni miraré a tu cara
pues se bien que intentaria
evitar que te marcharas,
vete ahora y dejame peleando con la soledad
y ahogaremos tu recuerdo
de cada beso, con mis lagrimas.
Si nunca fui con quien soñabas
entonces para que fingiste amor,
no sabes que me mandas al infierno con tu adios
y no estoy preparado
para un golpe al conrazón.
Pero no te voy a detener
aunque me duela el alma,
por que nada viene a detenerte
si ya no me amas,
te perdono el daño que me haces
que te vaya bien,
pero que logre olvidarte un dia
no se si podre.
Pero no te voy a detener
ni miraré a tu cara
pues se bien que intentaria
evitar que te marcharas,
vete ahora y dejame peleando con la soledad
y ahogaremos tu recuerdo
de cada beso, con mis lagrimas.
...Pero no te voy a detener...