Purine metabolism and the biosynthesis of caffeine in maté leaves (Record no. 41057)
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| 000 -LEADER | |
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| fixed length control field | 01761nam a2200241Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625124648.0 |
| 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-6718 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Purine metabolism and the biosynthesis of caffeine in maté leaves |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | PhytoChemistry , 33(6), p.1427-1430, 1993 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Purine metabolism and the biosynthesis of purine alkaloids in leaves of maté plants were investigated by administering [8-14C]adenine,[8-14C]guanosine and [8-14C]hypoxanthine to maté plants of different ages. Each precursor was incorporated into theobromine and caffeine in young leaves. No biosynthesis of these purine alkaloids took place in mature dark-green leaves. Pulse-chase experiments and the inhibitory effects of coformycin suggest that the biosynthesis of caffeine from adenine nucleotides is initiated by the reaction catalysed by AMP deaminase. The conventional pathway for the degradation of purines via allantoin and allantoic acid appeared to be operative in both young and mature leaves. No significant degradation of caffeine was detected in the tracer experiments. The levels of adenine nucleotides in young maté leaves were about five times higher than those of guanine nucleotides. Other possible pathways of purine metabolism in maté leaves are discussed. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | ILEX PARAGUARIENSIS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | AQUIFOLIACEAE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MATÉ; BIOSYNTHESIS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | PURINE METABOLISM |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | CAFFEINE |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | THEOBROMINE. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hiroshi Ashihara |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1DFmyvcfdtvl1FUoL2b-3UTBkiSAxPiWy/view?usp=drivesdk">https://drive.google.com/file/d/1DFmyvcfdtvl1FUoL2b-3UTBkiSAxPiWy/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-6718 | 25.06.2025 | 25.06.2025 | Documentos solicitados |