| Title |
Crystalline pteridines in the stromal pigment cells of the iris of the Great Horned Owl
|
|---|---|
| Published in |
Cell and Tissue Research, May 1981
|
| DOI | 10.1007/bf00233588 |
| Pubmed ID | |
| Authors |
Lynn W. Oliphant |
| Abstract |
The bright yellow color of the iris of the Great Horned Owl (Bubo virginianus) is due to unusual pigment cells in the iris stroma. These cells are spherical and contain numerous clear lipid droplets. Around the periphery of these cells are ovoid crystalline granules that are highly birefringent and vary in color from yellow to clear gray. Differential extraction of the lipid droplets and peripheral granules with lipid solvents and 2% KOH confirmed the localization of the yellow pigment in these granules. The color, solubility, fluorescence, chromatographic mobility and ultraviolet absorption of the extracted pigment suggest it is primarily xanthopterin. It is proposed that the peripheral granules are crystalline pterinosomes capable of reflecting light. Most of the cells contain yellow reflecting granules and can be considered reflecting xanthophores. Cells lying deeper in the stroma have colorless reflecting granules and can be considered pteridine containing leucophores. |
Mendeley readers
The data shown below were compiled from readership statistics for 5 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 5 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Professor | 1 | 20% |
| Student > Ph. D. Student | 1 | 20% |
| Student > Bachelor | 1 | 20% |
| Unknown | 2 | 40% |
| Readers by discipline | Count | As % |
|---|---|---|
| Philosophy | 1 | 20% |
| Materials Science | 1 | 20% |
| Chemistry | 1 | 20% |
| Unknown | 2 | 40% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 03 November 2022.
All research outputs
#7,862,539
of 23,839,820 outputs
Outputs from Cell and Tissue Research
#527
of 2,279 outputs
Outputs of similar age
#1,777
of 7,119 outputs
Outputs of similar age from Cell and Tissue Research
#1
of 4 outputs
Altmetric has tracked 23,839,820 research outputs across all sources so far. This one is in the 44th percentile – i.e., 44% of other outputs scored the same or lower than it.
So far Altmetric has tracked 2,279 research outputs from this source. They receive a mean Attention Score of 3.3. This one is in the 45th percentile – i.e., 45% of its peers scored the same or lower than it.
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