Nature.
Publisher:
Macmillan Journals ltd.. Basingstoke : Nature Publishing Group
Frequency: Weekly
Country: England
Language: English
Start Year:1869 -
ISSN:
0028-0836 (Print)
1476-4687 (Electronic)
0028-0836 (Linking)
1476-4687 (Electronic)
0028-0836 (Linking)
Impact Factor
64.8
2022
| NLM ID: | 0410462 |
| (OCoLC): | 01586310 |
| (DNLM): | N07600000(s) |
| Coden: | NATUAS |
| Classification: | W1 NA81 |
Helix packing and subunit conformation in horse spleen apoferritin. An electron density map of horse spleen apoferritin at 0.28-nm (2.8 A) resolution and its preliminary interpretation have been described previously. Rigorous examination of this and newer maps at the same nominal resolution but calculated from more extensive data sets, including model building in a Richards' comparator, now allows us to report on structural features in more detail. We list inter-helical angles within and between neighbouring subunits, and describe a new short region of inter-subunit anti-parallel pleated sheet. A short section of electron density not properly accounted for in ...
Respiratory distress in a newborn foal with failure to form lung lining film. A SYNDROME in newborn thoroughbred foals, characterized by irregular respiration, convulsions, and lung pathology, has been described already1, and its resemblance to the respiratory distress syndrome of the newborn human noted. This latter condition is associated with the absence of the surface active lung lining complex, or lung surfactant2; this absence can be investigated by observation of bubbles obtained from the lung3. From normal lungs bubbles of very low surface tension which show great stability in air-saturated water can be obtained4,5. The present case demonstrates the common facto...
Progesterone biosynthesis by equine granulosa cells growing in tissue culture. OUR knowledge of the pathways of steroid biosynthesis in the ovary has been gained mainly by incubations of ovaries in vitro1,2. The tissues incubated have contained numerous cell types: granulosa cells, theca interna cells, stromal cells, interstitial cells, and sometimes luteal cells. Possibly such mixtures of two or more different cell types are able to secrete hormones that one cell type cannot secrete by itself3–9. Furthermore, during such incubations in vitro an exchange of precursors and products between different cell types may be facilitated because of breakdown of naturally occurri...