Yeast extract and process for its preparation

摘要: The process comprises extracting an essential component and RNA-containing yeast cells, decomposing the RNA into nucleotides using 5'-phosphodiesterase and, if desired, acting deaminase to prepare extract. In this process, a cell strain capable of yielding crude in high content is used upon decomposition nucleotides, aqueous solution containing cells previously heat-treated at 80 120°C thereby convert whole tasty 5'-nucleotide while inhibiting its conversion 2'- or 3'-nucleotide. conversion, alkali, common salt, surfactant are not necessarily large amounts unlike prior art, hence extract can be directly converted seasoning material 5'-GMP 5'-IMP amounts. Particularly, obtained by 10 % more, preferably 15 variant provides with particularly excellent taste. A novel amount, Candida utilis CSB 6316, also disclosed.