2010 Fiscal Year Final Research Report
Phylogenetic positions and biomineralization of eggshell proteins of turtles
| Project/Area Number |
20340142
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Stratigraphy/Paleontology
|
|---|
| Research Institution | University of Tsukuba |
|---|
Principal Investigator |
ENDO Kazuyoshi University of Tsukuba, 大学院・理学系研究科, 教授 (80251411)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HIRAYAMA Ren 早稲田大学, 国際教養学術院, 教授 (00238396)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SARASHINA Isao 東京大学, 大学院・理学系研究科, 研究員 (90375444)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 系統学 / 生体鉱物学 / カメ類 / 卵殻タンパク質 / 爬虫類 |
|---|
| Research Abstract |
We performed immunological assays on the extracts from eggshells of reptiles and birds. The results support that the archosaurian affinity of turtles. Raman measurements showed that eggshells of turtles are aragonite, whereas those of snakes, lizards, crocodiles and birds are calcite. We examined the ion composition in the secretions of the oviducts of soft-shelled turtles and hens. Under both the conditions, not aragonite but calcite is expected to be formed, suggesting that the switch between the polymorphs may be controlled by proteins.
|
