Detailed methods are described for preparation of bovine pancreatic ribonuclease (polyribonucleotide 2-ofigonucleotidotransferase (cyclizing), EC 2.7.7.16 ) crystals of Modifications I and II of quality suitable for X-ray diffraction studies. The reasons for choice of solvent and buffer systems are
Preparation of ribonuclease-free DNase I and α-amylase
✍ Scribed by Carleton T. Garrett; David S. Wilkinson; Henry C. Pitot
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 300 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0003-2697
No coin nor oath required. For personal study only.
✦ Synopsis
DNase I and cu-amylase are commercial products obtained from mammalian sources and may be separated from contaminating RNase by treatment. with bentonite. The completeness of RNase removal is demonstrated by using a highly sensitive technique employing E. coli ribosomal RKA as substrate.
📜 SIMILAR VOLUMES
Effects of isoflurane on the DNase I activity in an isolated enzyme preparation and in the DNase I-globular (G) actin complex were investigated. DNase I, DNase I-G actin complex, and G actin were exposed to various (0.2-4.0 ~0 1 % ) isoflurane concentrations for 180 min. Thereafter, DNase I activity
In this report, a-Amylase originating from Bacillus subtilis (liquefying type) was immobilized on partially imidoesterized polyacrylonitrile (PAN) by covalent bonding. For the preparation of immobilized a-amylase, which has a high activity and high stability to repeated use, the optimum conditions f
Purification and properties of a-amylase from Micrococcus variuns ADEYEMI I . ADELEYE i Rcc?ird I 0 .4u</i~s/ 19cYYiArccy,tetl 6 FdJruciry I9901 An extraccllular cx-amylase from Micrococcus ivxinns was partially purified (63 fold) by ammonium sulphate precipitation followed by dialysis and separate
## Abstract An extracellular α‐amylase was induced in cultures of __Micrococcus varians__ during growth in a liquid medium containing starch as sole carbon source. Synthesis of this enzyme was repressed by the addition of glucose or fructose to starch metabolizing cells and was induced in a glucose