Cover illustration: The A.thaliana cytochrome b5 At1g23640 and the rabbit cytochrome b5 mitochondrial form b5-RRNglyc are targeted to the chloroplast envelope in plant cells. Panels on the left: confocal microscopy of tobacco leaves infiltrated with an Agrobacterium strain carrying the Arabidopsis cytochrome b5 isoform fused to the YFP marker (YFP::At1g). Upper, green: YFP. Middle, blue: chlorophyll autofluorescence. Bottom: merge of green/blue. Bar: 4 mm. Panels on the right: confocal microscopy of tobacco leaf protoplasts expressing the rabbit cytochrome b5 mitochondrial form b5-RRNglyc. Protoplasts were analysed by immunofluorescence using anti-OP3 monoclonal antibody and secondary Alexa Fluor 488 goat anti-mouse antibody (green, upper panel). Middle, red: chlorophyll autofluorescence. Bottom: merge of green/red. Bar: 2 μm. (see Maggio et al., pp.1365–1381.)
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