<prompt> Yini ehilelekile ekuhambeni endleleni ye-secretory? Njengoba kunikezwe umbuzo odlule, bhala umongo onempendulo yawo. Kungaba imisho engu-1 kuya kwengu-20. Umongo:  <response>: Ngokuthakazelisayo, cishe ingxenye yemikhiqizo yamaprotheni yezakhi zofuzo ezidluliselwe ayibuyeli ngisho nakuyi-chloroplast. Eziningi zaba ama-exaptation, zathatha imisebenzi emisha njengokubamba iqhaza ekuhlukaneni kwamangqamuzana, ekuqondiseni amaprotheni, ngisho nasekuvikeleni izifo. Ama-chloroplast genes ambalwa athola amakhaya amasha ku-mitochondrial genome - iningi laba ama-pseudogenes angasebenzi, yize ama-tRNA genes ambalwa esasebenza ku-mitochondrion. Eminye imikhiqizo yamaprotheni e-DNA ye-chloroplast idluliselwa emzileni wokukhipha yize kufanele kuphawulwe ukuthi ama-plastide amaningi wesibili aboshwe ulwelwesi olungaphandle kakhulu oluvela kulwelwesi lweseli lomgcini, ngakho-ke ngaphandle kweseli, ngoba ukufinyelela i-chloroplast kusuka ku-cytosol, kufanele uwele ulwelwesi lweseli, njengalapho ubheke esikhaleni esingaphandle kwamangqamuzana. Ezimweni ezinjalo, amaprotheni aqondiswe kuma-chloroplast ahamba kuqala endleleni yokukhipha. 