- Methionine
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- $29.00 / 1g
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2025-09-29
- CAS:348-67-4
- Min. Order:
- Purity: 99.62%
- Supply Ability: 10g
- D-Methionine
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- $0.00 / 25Kg/Drum
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2025-09-29
- CAS:348-67-4
- Min. Order: 1KG
- Purity: 99%min AJI
- Supply Ability: 1000kg
- D-Methionine
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- $79.00 / 1KG
-
2021-11-02
- CAS:348-67-4
- Min. Order: 1KG
- Purity: 99
- Supply Ability: 10T
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| | D-Methionine Basic information |
| | D-Methionine Chemical Properties |
| Melting point | 273-275 °C | | alpha | -24 º (c=8, 6N HCl) | | Boiling point | 306.9±37.0 °C(Predicted) | | density | 1.113 (estimate) | | refractive index | 1.5216 (estimate) | | storage temp. | Sealed in dry,Room Temperature | | solubility | 53 g/L (20°C) | | pka | 2.23±0.10(Predicted) | | form | Powder | | color | White to off-white | | Water Solubility | 53 g/L (20 ºC) | | Merck | 14,5975 | | BRN | 1722293 | | Stability: | Stable. Incompatible with strong oxidizing agents. | | LogP | 0.370 (est) | | CAS DataBase Reference | 348-67-4(CAS DataBase Reference) | | NIST Chemistry Reference | D-(l)-Methionine(348-67-4) | | EPA Substance Registry System | D-Methionine (348-67-4) |
| | D-Methionine Usage And Synthesis |
| Chemical Properties | White crystalline powder | | Uses | D-Methionine is used to rescue noise-induced hearing loss. It is used to improve the nutritive value of animal feed. | | Definition | ChEBI: An optically active form of methionine having D-configuration. | | Biochem/physiol Actions | D-methionine has been shown to rescue noise-induced hearing loss. | | Synthesis | The general procedure for the determination of N-d-AAase activity using N-acetyl-D-methionine as substrate was as follows: first, N-d-AAase was incubated with N-acetyl-D-methionine at 4°C. Subsequently, a colorimetric solution mixture containing d-amino acid oxidase (coupled with horseradish peroxidase), peroxidase (10 U/mL), 4-aminoantipyrine (0.04 mg/mL) and phenol (0.8 mM) was added. Absorbance (OD) was measured at 520 nm. The unit of enzyme activity was defined as the amount of catalytic production of 1 μmol D-methionine per minute. Protein concentration was determined by the Bradford method using bovine serum albumin as standard [32]. The kinetic parameters kcat and Km were determined by fitting the initial rate as a function of substrate concentration to the Michaelis-Menten equation. | | References | [1] Journal of the American Chemical Society, 1953, vol. 75, p. 4058
[2] Journal of Biological Chemistry, 1952, vol. 194, p. 455,458
[3] Journal of the American Chemical Society, 1951, vol. 73, p. 4604
[4] Bulletin of the Agricultural Chemical Society of Japan, 1957, vol. 21, p. 235,237
[5] Bioscience, biotechnology, and biochemistry, 1992, vol. 56, # 9, p. 1392 - 1395 |
| | D-Methionine Preparation Products And Raw materials |
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