| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T1 |
0-67 |
Sentence |
denotes |
Recruitment of a foreign quinone into the A1 site of photosystem I. |
| T2 |
68-220 |
Sentence |
denotes |
Altered kinetics of electron transfer in phylloquinone biosynthetic pathway mutants studied by time-resolved optical, EPR, and electrometric techniques. |
| T3 |
221-279 |
Sentence |
denotes |
Interruption of the menA or menB gene in Synechocystis sp. |
| T4 |
280-460 |
Sentence |
denotes |
PCC 6803 results in the incorporation of a foreign quinone, termed Q, into the A(1) site of photosystem I with a number of experimental indicators identifying Q as plastoquinone-9. |
| T5 |
461-593 |
Sentence |
denotes |
A global multiexponential analysis of time-resolved optical spectra in the blue region shows the following three kinetic components: |
| T6 |
594-944 |
Sentence |
denotes |
1) a 3-ms lifetime in the absence of methyl viologen that represents charge recombination between P700(+) and an FeS(-) cluster; 2) a 750-microseconds lifetime that represents electron donation from an FeS(-) cluster to methyl viologen; and 3) an approximately 15-microseconds lifetime that represents an electrochromic shift of a carotenoid pigment. |
| T7 |
945-1201 |
Sentence |
denotes |
Room temperature direct detection transient EPR studies of forward electron transfer show a spectrum of P700(+) Q(-) during the lifetime of the spin polarization and give no evidence of a significant population of P700(+) FeS(-) for t </= 2-3 microseconds. |
| T8 |
1202-1447 |
Sentence |
denotes |
The UV difference spectrum measured 5 microseconds after a flash shows a maximum at 315 nm, a crossover at 280 nm, and a minimum at 255 nm as well as a shoulder at 290-295 nm, all of which are characteristic of the plastoquinone-9 anion radical. |
| T9 |
1448-1756 |
Sentence |
denotes |
Kinetic measurements that monitor Q at 315 nm show a major phase of forward electron transfer to the FeS clusters with a lifetime of approximately 15 microseconds, which matches the electrochromic shift at 485 nm of the carotenoid, as well as an minor phase with a lifetime of approximately 250 microseconds. |
| T10 |
1757-1815 |
Sentence |
denotes |
Electrometric measurements show similar biphasic kinetics. |
| T11 |
1816-1959 |
Sentence |
denotes |
The slower kinetic phase can be detected using time-resolved EPR spectroscopy and has a spectrum characteristic of a semiquinone anion radical. |
| T12 |
1960-2174 |
Sentence |
denotes |
We estimate the redox potential of plastoquinone-9 in the A(1) site to be more oxidizing than phylloquinone so that electron transfer from Q(-) to F(X) is thermodynamically unfavorable in the menA and menB mutants. |
