Formation of a stable L-ascorbic acid a-glucoside by mammalian a-glucosidase-catalyzed transglucosylation (Record no. 43126)
[ view plain ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 02072nam a2200217Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625124728.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-8850 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Formation of a stable L-ascorbic acid a-glucoside by mammalian a-glucosidase-catalyzed transglucosylation |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Biochimica et Biophysica Acta, 1035(1), p.44-50, 1990 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Enzymatic transglucosylation from maltose to L-ascorbic acid (AA)with mammalian tissue homogenates was determined by a high-performance liquid chromatography method and compared with the reaction catalyzed by a-glucosidase from Aspergillus niger. The homogenates of small intestine and kidney had a high transglucosylase activity to form a new type of glucosylated AA, which was associated with a-glucosidase activity. The new compound was demonstrated to be an equimolar conjugate of AA and glucose by the spectral and quantitative analyses. In particular, it showed a high stability in a neutral solution and no reducing activity toward cytochrome c and a dye. These properties were very different from those of AA and L-ascorbic acid a-glucoside formed with a-glucosidase from A. niger, but they were consistent with those of L-ascorbic acid 2-O-phosphate and L-ascorbic acid 2-O-sulfate. Moreover, it exhibited a reducing power associated with AA after mild acid hydrolysis or treatment with rat intestinal a-glucosidase. These results indicate that it should be assigned the 2-O-a-glucoside structure. Consequently, it is concluded that mammalian a-glucosidase is able to form a very stable and nonreducing form of glucosylated AA through a specific transglucosylation reaction distinct from that of microbial a-glucosidase. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yamamoto, I. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Muto, N. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nagata, E. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nakamura, T. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Suzuki, Y. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1t5C5pWQxNqTqIQrFt6Hz6RPeUcaH7g7f/view?usp=drivesdk">https://drive.google.com/file/d/1t5C5pWQxNqTqIQrFt6Hz6RPeUcaH7g7f/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-8850 | 25.06.2025 | 25.06.2025 | Documentos solicitados |