A NEW METHOD FOR THE ISOLATION OF l-ALANINE AND l-PROLINE FROM PROTEIN HYDROLYSATES
نویسندگان
چکیده
منابع مشابه
A new method for the isolation of L-alanine and L-proline from protein hydrolysates.
The present investigation deals with the development of a convenient method for the isolation of alanine and proline from protein hydrolysates. In this work the authors aim to eliminate some of the objections inherent in the older methods (l-6). No expensive reagents are required for the separation of these amino acids, and high yields of the pure final products are secured. In a recent publica...
متن کاملA new method for isolation of hydroxy-L-proline and L-proline from gelatin.
Several investigators have reported that commercial L-proline is contaminated with small amounts of hydroxy-n-proline (l-3). During the course of investigations in this laboratory all of five commercial samples proved to contain up to 3.5 per cent hydroxyproline when tested by the method of Neuman and Logan (1). The preparation of n-proline from gelatin by the formation of complex salts is tedi...
متن کاملA new method for the direct isolation of glycine from protein hydrolysates.
A number ofprocedures have been proposed for the isolation of glycine from protein hydrolysates. The ester method originally described by Fischer (1901) is laborious and involves great losses, owing largely to incomplete precipitation of glycine ester hydrochloride and the volatility of the free ester. The precipitation of glycine as its barium carbamate (Kingston & Schryver, 1924) is time-cons...
متن کاملA simple and convenient method for the preparation of antioxidant peptides from walnut (Juglans regia L.) protein hydrolysates
BACKGROUND Walnut (Juglans regia L.), that belongs to the Juglandaceae family, is one of the nuts commonly found in Chinese diets. Researchers had obtained peptides from walnut protein hydrolysates, and these peptides exhibited the high antioxidant activities. The objective of this study was to develop a simple and convenient method for a facile and reproducible preparation of antioxidant pepti...
متن کاملIsolation of Methionine from Protein Hydrolysates
In the preceding papers (1, 2) the preparation and properties of sulfonium salts of methionine were described. The ease of formation of the methylsulfonium salt and the solubility properties of its phosphotungstate suggest utilization for the characterization of methionine in amino acid mixtures, since the phosphotungstates of other a-amino acids are readily soluble in cold aqueous alcohol whil...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1957
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)70767-9