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This Week in ScienceMany of the proteins found inside chloroplasts are transcribed from genes that reside in the nucleus. Importing such proteins into the plastid compartments is in part the function of translocon complexes in the chloroplast membrane. Jarvis et al. (p. 100) have identified the gene for one of the components of chloroplast translocons in the plant Arabidopsis. Similarities to related proteins suggest that there may be more than one type of translocon, perhaps with differentiated functions.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)