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EnglishThis paper deals with the isolation and partial characterization of a protein capable of high affinity sulfobromophthalein-binding from liver plasma membrane. The purification involves acetone powder of a crude preparation of rat liver plasma membrane, salt extraction and purification through two chromatographic steps. Based on sulfobromophthalein binding, the process gives a yield of approximately 40%, with a purification of about 300 times with respect to the starting homogenate. The best preparation can bind more than 100 nmol sulfobromophthalein/mg protein. The protein behaves as a single species in dodecyl sulphate polyacrylamide gel electrophoresis, with an apparent molecular weight of 1.7 · 105. The molecule does not contain sugars. The dissociation constant of the protein · sulfobromophthalein complex has been found to be 4 · 10−6 M, a value in agreement with that of high affinity binding sites described on isolated liver plasma membrane.
| Titolo: | Isolation of a sulfobromophthalein binding protein from hepatocyte plasma membrane |
| Autori: | |
| Data di pubblicazione: | 1978 |
| Rivista: | |
| Abstract: | This paper deals with the isolation and partial characterization of a protein capable of high affinity sulfobromophthalein-binding from liver plasma membrane. The purification involves acetone powder of a crude preparation of rat liver plasma membrane, salt extraction and purification through two chromatographic steps. Based on sulfobromophthalein binding, the process gives a yield of approximately 40%, with a purification of about 300 times with respect to the starting homogenate. The best preparation can bind more than 100 nmol sulfobromophthalein/mg protein. The protein behaves as a single species in dodecyl sulphate polyacrylamide gel electrophoresis, with an apparent molecular weight of 1.7 · 105. The molecule does not contain sugars. The dissociation constant of the protein · sulfobromophthalein complex has been found to be 4 · 10−6 M, a value in agreement with that of high affinity binding sites described on isolated liver plasma membrane. |
| Handle: | http://www.sciencedirect.com/science/article/pii/0005279578904531 http://hdl.handle.net/11368/2844172 |
| Digital Object Identifier (DOI): | 10.1016/0005-2795(78)90453-1 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |