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Example sentences for: lhcps
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A stable complex should be achieved with only Chl a, in a Chl b -less plant or by in vitro reconstitution, when weak ligands in LHCPs are replaced with stronger Lewis bases.
The work already done has established that several LHCPs are imported into the chloroplast at a substantial rate only when sufficient Chl b is available and they accumulate initially in the envelope membrane.
It should be noted, however, that several LHCPs accumulate in chloroplasts in the absence of Chl b [ 5 8 ] , perhaps because they integrate more easily into membranes, which implies that other features of the proteins are involved.
The initial accumulation of LHCPs in the chloroplast envelope implies that Chl interacts with these proteins, likely by binding to the conserved motif in the first membrane-spanning region (helix-1) [ 25 26 ] when transit through the envelope is initiated.
An important role of Chl b was further revealed by experiments in which newly synthesized LHCPs were detected by pulse-labeling in Chl b -less mutant plants but the proteins were not recovered in chloroplasts isolated from these plants [ 4 ] . These Chl b -less plants did not accumulate several of the LHCPs, in particular Lhcb1, Lhcb6 and Lhca4 [ 5 ] . Chl b was not detected in plants exposed to intermittent light (cycles of 2 min of light and 98 min of darkness), which accumulated only small amounts of Chl a and thylakoid membranes [ 6 7 ] . Wild-type plants treated in this way accumulated only one LHCP (Lhcb5), while Chl b -less mutants exposed to intermittent light lacked all LHCPs [ 8 ] . In complementary fashion, Chl b did not accumulate when synthesis of LHCPs was inhibited [ 9 ] . When bean plants exposed to intermittent light were treated with chloramphenicol to inhibit synthesis of proteins on chloroplast ribosomes, Chl
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