Orientation of chlorophyll in vivo. Studies with magnetic field oriented Chlorella

J. F. Becker; N. E. Geacintov; F. Van Nostrand; R. Van Metter

doi:10.1016/0006-291X(73)91356-9

Orientation of chlorophyll in vivo. Studies with magnetic field oriented Chlorella

J. F. Becker, N. E. Geacintov, F. Van Nostrand, R. Van Metter

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The orientation of whole cells of Chlorella pyrenoidosa in aqueous suspensions is due to the anisotropy in the diamagnetic susceptibility of oriented chlorophyll molecules. The lipid molecules tend to align with their long axes parallel to the magnetic field and the "red" Q_y transition moment of chlorophyll perpendicular to the field, thus in the plane of the lamellae. The plane of the porphyrin rings tends to be parallel to the magnetic field because of the large diamagnetic susceptibility perpendicular to the ring. It is concluded that the porphyrin ring planes tilt away from the lamellar plane by an angle greater than 45°. The short wavelength spectroscopic forms of chlorophyll are unoriented.

Original language	English (US)
Pages (from-to)	597-602
Number of pages	6
Journal	Biochemical and Biophysical Research Communications
Volume	51
Issue number	3
DOIs	https://doi.org/10.1016/0006-291X(73)91356-9
State	Published - Apr 2 1973

ASJC Scopus subject areas

Biophysics
Biochemistry
Molecular Biology
Cell Biology

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10.1016/0006-291X(73)91356-9

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@article{7149e7d1ebef4fbfaffb06165d8d0f86,

title = "Orientation of chlorophyll in vivo. Studies with magnetic field oriented Chlorella",

abstract = "The orientation of whole cells of Chlorella pyrenoidosa in aqueous suspensions is due to the anisotropy in the diamagnetic susceptibility of oriented chlorophyll molecules. The lipid molecules tend to align with their long axes parallel to the magnetic field and the {"}red{"} Qy transition moment of chlorophyll perpendicular to the field, thus in the plane of the lamellae. The plane of the porphyrin rings tends to be parallel to the magnetic field because of the large diamagnetic susceptibility perpendicular to the ring. It is concluded that the porphyrin ring planes tilt away from the lamellar plane by an angle greater than 45°. The short wavelength spectroscopic forms of chlorophyll are unoriented.",

author = "Becker, {J. F.} and Geacintov, {N. E.} and {Van Nostrand}, F. and {Van Metter}, R.",

note = "Funding Information: This work was supported in part by the Atomic Energy Commission and National Science Foundation, and in part by equipment grants to one of us (N. E. G. ) by the Research Corporation and by a National Institute of Health Grant to New York University. We acknowledge useful discussions with C. E, Swenberg, R. S. Knox, M. Pope and J. Breton.",

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language = "English (US)",

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T1 - Orientation of chlorophyll in vivo. Studies with magnetic field oriented Chlorella

AU - Becker, J. F.

AU - Geacintov, N. E.

AU - Van Nostrand, F.

AU - Van Metter, R.

N1 - Funding Information: This work was supported in part by the Atomic Energy Commission and National Science Foundation, and in part by equipment grants to one of us (N. E. G. ) by the Research Corporation and by a National Institute of Health Grant to New York University. We acknowledge useful discussions with C. E, Swenberg, R. S. Knox, M. Pope and J. Breton.

PY - 1973/4/2

Y1 - 1973/4/2

N2 - The orientation of whole cells of Chlorella pyrenoidosa in aqueous suspensions is due to the anisotropy in the diamagnetic susceptibility of oriented chlorophyll molecules. The lipid molecules tend to align with their long axes parallel to the magnetic field and the "red" Qy transition moment of chlorophyll perpendicular to the field, thus in the plane of the lamellae. The plane of the porphyrin rings tends to be parallel to the magnetic field because of the large diamagnetic susceptibility perpendicular to the ring. It is concluded that the porphyrin ring planes tilt away from the lamellar plane by an angle greater than 45°. The short wavelength spectroscopic forms of chlorophyll are unoriented.

AB - The orientation of whole cells of Chlorella pyrenoidosa in aqueous suspensions is due to the anisotropy in the diamagnetic susceptibility of oriented chlorophyll molecules. The lipid molecules tend to align with their long axes parallel to the magnetic field and the "red" Qy transition moment of chlorophyll perpendicular to the field, thus in the plane of the lamellae. The plane of the porphyrin rings tends to be parallel to the magnetic field because of the large diamagnetic susceptibility perpendicular to the ring. It is concluded that the porphyrin ring planes tilt away from the lamellar plane by an angle greater than 45°. The short wavelength spectroscopic forms of chlorophyll are unoriented.

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U2 - 10.1016/0006-291X(73)91356-9

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SN - 0006-291X

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JO - Biochemical and Biophysical Research Communications

JF - Biochemical and Biophysical Research Communications

IS - 3

ER -

Orientation of chlorophyll in vivo. Studies with magnetic field oriented Chlorella

Abstract

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