Differences in denaturation of genetic variants of soy glycinin |
| |
| Authors: | Lakemond Catriona M M De Jongh Harmen H J Gruppen Harry Voragen Alphons G J |
| |
| Institution: | Center for Protein Technology TNO-WU, Wageningen, The Netherlands. |
| |
| Abstract: | In heat denaturation studies conducted in the past the genetic variants of glycinin have been considered as a homogeneous group of proteins. In this work the validity of this assumption was tested. It was found by calorimetric studies that glycinin denatures heterogeneously at pH 7.6. When the temperature of isothermal treatment is increased from 70 to 82 degrees C the proportion of glycinin remaining native progressively decreases from 95% to 5% while the denaturation temperature of the glycinin remaining native increases from 88.5 to 95 degrees C. Similar trends were found for pH 3.8. Fractionation and subsequent analysis (MALDI-TOF and CE) of isothermally treated samples demonstrated that at pH 7.6 the heterogeneous denaturation is caused by differences in thermal stability of the genetic variants of glycinin. The stability increases in the order G2/G3/G1< A(4)< G5 < G4. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
