Sandbox 173: Difference between revisions

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==Introduction==

===Rhodopsin===

Rhodopsin, a homodimeric protein, is a highly characterized [http://en.wikipedia.org/wiki/G_protein-coupled_receptor G protein-coupled receptor] found in membranous disks of the outer segments of rod and cone cells, though rhodopsin is more concentrated in rod cells. It is part of the superfamily of G protein-coupled receptors that mediate responses to visual, olfactory, hormonal, and neurotransmitter signals among others<ref>Article 1</ref>. Rhodopsin is involved in visual signal transduction and the visual system in classic G protein-coupled receptor mechanisms<ref>Article 12</ref>.

Rhodopsin, a homodimeric protein, is a highly characterized [http://en.wikipedia.org/wiki/G_protein-coupled_receptor G protein-coupled receptor] found in membranous disks of the outer segments of rod and cone cells, though rhodopsin is more concentrated in rod cells, cells that are sensitive to light but cannot discriminate colors. It is part of the superfamily of G protein-coupled receptors that mediate responses to visual, olfactory, hormonal, and neurotransmitter signals among others<ref>Article 1</ref>. Rhodopsin is involved in visual signal transduction and the visual system in classic G protein-coupled receptor mechanisms<ref>Article 12</ref>.

===G Protein-Coupled Receptors===

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===Colour Vision===

Opsins are also photoreceptor proteins and are concentrated in cone cells, cells that are less sensitive to light but can discriminate colours~~, unlike rod cells~~. Opsins are slightly different light receptors than rhodopsin in that they can detect light from different spectrums and distinguish between their wavelengths. The ability to differentiate between colours is related to the three types of cone cells, each using one of the three related opsin photoreceptors<ref>Textbook</ref>.

Opsins are also photoreceptor proteins and are concentrated in cone cells, cells that are less sensitive to light but can discriminate colours. Opsins are slightly different light receptors than rhodopsin in that they can detect light from different spectrums and distinguish between their wavelengths. The ability to differentiate between colours is related to the three types of cone cells, each using one of the three related opsin photoreceptors<ref>Textbook</ref>.

Sandbox 173: Difference between revisions

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@@ Line 2: / Line 2: @@
 ==Introduction==
 ===Rhodopsin===
-Rhodopsin, a homodimeric protein, is a highly characterized [http://en.wikipedia.org/wiki/G_protein-coupled_receptor G protein-coupled receptor] found in membranous disks of the outer segments of rod and cone cells, though rhodopsin is more concentrated in rod cells. It is part of the superfamily of G protein-coupled receptors that mediate responses to visual, olfactory, hormonal, and neurotransmitter signals among others<ref>Article 1</ref>. Rhodopsin is involved in visual signal transduction and the visual system in classic G protein-coupled receptor mechanisms<ref>Article 12</ref>.
+Rhodopsin, a homodimeric protein, is a highly characterized [http://en.wikipedia.org/wiki/G_protein-coupled_receptor G protein-coupled receptor] found in membranous disks of the outer segments of rod and cone cells, though rhodopsin is more concentrated in rod cells, cells that are sensitive to light but cannot discriminate colors. It is part of the superfamily of G protein-coupled receptors that mediate responses to visual, olfactory, hormonal, and neurotransmitter signals among others<ref>Article 1</ref>. Rhodopsin is involved in visual signal transduction and the visual system in classic G protein-coupled receptor mechanisms<ref>Article 12</ref>.
 ===G Protein-Coupled Receptors===
@@ Line 78: / Line 78: @@
 ===Colour Vision===
-Opsins are also photoreceptor proteins and are concentrated in cone cells, cells that are less sensitive to light but can discriminate colours, unlike rod cells. Opsins are slightly different light receptors than rhodopsin in that they can detect light from different spectrums and distinguish between their wavelengths. The ability to differentiate between colours is related to the three types of cone cells, each using one of the three related opsin photoreceptors<ref>Textbook</ref>.
+Opsins are also photoreceptor proteins and are concentrated in cone cells, cells that are less sensitive to light but can discriminate colours. Opsins are slightly different light receptors than rhodopsin in that they can detect light from different spectrums and distinguish between their wavelengths. The ability to differentiate between colours is related to the three types of cone cells, each using one of the three related opsin photoreceptors<ref>Textbook</ref>.