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. 2007 Jan 10;104(3):790–795. doi: 10.1073/pnas.0605911104

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© 2007 by The National Academy of Sciences of the USA

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Fig. 1. — Two-dimensional MAS ¹³C¹³C dipolar correlation NMR spectra of uniformly ¹³C-labeled chlorosomes from C. limicola are shown. (A) Chemical structure of BChl c isomers is shown. Numbers with prefix F are carbon atoms in the farnesyl chain. BChl c has two stereoisomers with chirality at the 3¹ position and homologues with different side chains at C8 and C12 as shown on the right. The head, middle, and tail parts are also indicated. The z-axis is perpendicular to the ring plane. (B) Two-dimensional ¹³C correlation spectrum with an rf-driven recoupling mixing time of 1.28 ms is shown. (C) Two-dimensional ¹³C correlation spectrum with a SPC-5 mixing time of 1.1 ms is shown. The red lines stand for negative contour levels. (D) Displayed are the connectivities of the doublet signals shown in a part of the 2D ¹³C NMR spectrum in B. Two individual connectivities for signals a and b are shown by solid and dashed lines, respectively, from C7¹ to C3¹, and are indicated by assignments with and without parentheses.

Inline graphic — Two-dimensional MAS ¹³C¹³C dipolar correlation NMR spectra of uniformly ¹³C-labeled chlorosomes from C. limicola are shown. (A) Chemical structure of BChl c isomers is shown. Numbers with prefix F are carbon atoms in the farnesyl chain. BChl c has two stereoisomers with chirality at the 3¹ position and homologues with different side chains at C8 and C12 as shown on the right. The head, middle, and tail parts are also indicated. The z-axis is perpendicular to the ring plane. (B) Two-dimensional ¹³C correlation spectrum with an rf-driven recoupling mixing time of 1.28 ms is shown. (C) Two-dimensional ¹³C correlation spectrum with a SPC-5 mixing time of 1.1 ms is shown. The red lines stand for negative contour levels. (D) Displayed are the connectivities of the doublet signals shown in a part of the 2D ¹³C NMR spectrum in B. Two individual connectivities for signals a and b are shown by solid and dashed lines, respectively, from C7¹ to C3¹, and are indicated by assignments with and without parentheses.