2 edition of Studies on host range, fine structure, and nucleic acids of lactic streptococcus bacteriophages found in the catalog.
Studies on host range, fine structure, and nucleic acids of lactic streptococcus bacteriophages
Joanne Annette Nyiendo
Written in English
|Statement||by Joanne Annette Nyiendo.|
|The Physical Object|
|Pagination||, 128 leaves, bound :|
|Number of Pages||128|
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Studies on host range, fine structure, and nucleic acids of lactic streptococcus bacteriophages Public Deposited. Analytics × Add This study was undertaken to characterize the host range, morphology, and nucleic acid types of 35 lactic streptococcus bacteriophages; and to investigate the interrelationship between these characters.
Cited by: 5. STUDIES ON HOST RANGE, FINE STRUCTURE, AND NUCLEIC ACIDS OF LACTIC STREPTOCOCCUS BACTERIOPHAGES INTRODUCTION Bacteriophage lysis of lactic acid bacteria was reported as early as (7).
It has since been shown to be one of the most in o f-tnt causes of slow acid development in fermented dairy pro-ducts (3, 6). This study was\ud undertaken to characterize the host range, morphology, and fine structure acid types of 35 lactic streptococcus bacteriophages; and to investigate\ud the interrelationship between these characters.\ud Preliminary experiments revealed a simple procedure for\ud obtaining high.
Studies on host range, fine structure, and nucleic acids of lactic streptococcus bacteriophages / Electron microscopic studies were made on eight virulent Streptococcus lactis bacteriophages. The paper reviews the bacteriophages of the group N lactic streptococci centering on isolation, ultrastructure and morphology, phage receptors, the structure of the genome, protein components, the phenomenon of the lysogenic state, restriction-modification systems and genetic exchange by transfection and transduction.
The resulting consequences on industrial fermentations Cited by: Little information is available on the occurrence of bacteriophages in Lact. fermentum (5; 11, 10). The aim of the present work was to investigate the basic properties of six temperate and three virulent bacteriophages active on Lact.
fermentum by comparing morphology, host range, structural proteins and genome characteristics. MATERIALS AND. Phage P belongs to largest phages ever described for lactic streptococci The flexible and long tail is clearly segmented (Fig. 2E). A distinct baseplate cannot be demonstrated (Fig.
4H). The empty head is similar to that of P 3. Host range of the types of phages Table 2 shows the host range of most of the investigated phage types.
Manyforms of nucleic acids the ways that information is of bacteriophages show stored and reproduced. Cohen The chromosomes of microorga- nisms, particularly those of viruses, are structurally the simplest and consist merely of nucleic acid. Among the viruses the bacteriophages (phages) are the most appropriate for study ifh view of the ease with which they can be cultured.
Studies on host range, fine structure, and nucleic acids of lactic streptococcus bacteriophages / Three lactic streptococcal bacteriophages were compared with one another by electron. Such studies represent the most conclusive evidence that DNA is responsible for the transfer of genetic information, at least in micro-organisms and viruses.
The evidence that this is also true in higher Nucleic acids:structure and function 7 2 5. Isolation and structure of nucleic acids)].
Exten- sive genetic studies of lactic phages are required to elucidate relationships be- tween phage and host, particularly as they relate to phage resistance in lactic acid bacteria. INTRODUCTION The infection of tactic acid bacteria by bac- teriophage is of considerable economic impor- tance to the dairy industry.
The genus Streptococcus emcompasses Gram‐positive, catalase‐negative, facultatively aerobic and homofermentative cocci which produce l(+)‐lactic acid as major end product of glucose fermentation. The cells are spherical or ovoid and occur in chains or pairs when grown in liquid media.
Streptococci are of great medical importance as they are pathogens and commensals of the mucosal. Nucleic acids are the most important macromolecules for the continuity of carry the genetic blueprint of a cell and carry instructions for the functioning of the cell.
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).DNA is the genetic material found in all living organisms, ranging from single-celled bacteria to multicellular mammals.
The nucleic acids of bacteriophages are characterized by a surprising multiformity. RNA and DNA may occur, the latter in single- or double-stranded form, circular or linear, with or without breaks or single-strand ends.
Terminal redundancy may exist and the populations of linear phages may be uniform or randomly permuted. A double-stranded circular DNA does not occur in extracellular. Cheese starters* - Volume 43 Issue 1 - R. Lawrence, T. Thomas, B. Terzaghi. To send this article to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account.
Working with Molecular Genetics Chapter 2. Structures of Nucleic Acids labels in biology.) As diagrammed in Fig.The proteins of T2 phage were labeled with 35S (e.g.
in methionine and cysteine) and the DNA was labeled with 32P (in the sugar-phosphate backbone, as will be. Streptococcus, (genus Streptococcus), group of spheroidal bacteria belonging to the family Streptococcaceae.
The term streptococcus (“twisted berry”) refers to the bacteria’s characteristic grouping in chains that resemble a string of beads. Streptococci are microbiologically characterized as gram-positive and nonmotile. Streptococcus contains a variety of species, some of which cause.
Abstract. A total of strains of mesophilic strains lactic streptococci of the species Streptococcus lactis, S. lactis subsp. diacetilactis, and S. cremoris, chosen from strains that had been previously classified into six groups on the basis of their sensitivity to virulent phages, were subjected to induction with mitomycin these strains, 43% produced phages capable of.
Nucleic Acids Book. A free online book on the chemistry and biology of nucleic acids, written by Prof. Tom Brown and Dr Tom Brown (Jnr). The book is ideal for chemistry and biology students and also provides practical information for researchers working in the lab.
The temperature ranges for growth of Streptococcus mutans GS-5 and S. sobrinus were found to be very narrow, from about 30 to 47 °C, with optimal growth around 37 °C. Thus, the organisms showed little potential to grow in the environment outside of the animal host.
In contrast wider ranges were found for Enterococcus hirae, S. rattus and S. sanguis. Detailed study of S.
mutans GS of complex cells. Elemental analysis of nucleic acids showed the presence of phosphorus, in addition to the usual C, H, N & O. We now know that nucleic acids are found throughout a cell, not just in the nucleus, the name nucleic acid is still used for such materials.
A nucleic acid is a polymer in which the monomer units are nucleotides. • For nucleic acids, tertiary structure refers to the overall three-dimensional shape. • In DNA, tertiary structure arises from supercoiling, which involves double helices being twisted into tighter, more compact shapes.
3) Tertiary Structure. Streptococcus pneumoniae is the most frequent cause of community-acquired pneumonia. The infection process involves bacterial cell surface receptors, which interact with host extracellular matrix. Since its inception inNucleic Acids and Molecular Biology has emerged as a high-visibility series that brings to the scientific community in-depth analyses of cutting-edge topics in the field.
Each volume offers a focused. Several lactic acid bacteria (LAB) isolates from the Lactobacillus genera have been applied in food preservation, partly due to their antimicrobial properties. Their application in the control of human pathogens holds promise provided appropriate strains are scientifically chosen and a suitable mode of delivery is utilized.
Urinary tract infection (UTI) is a global problem, affecting mainly. Nucleic acid has two types, DNA and RNA, which not only helps us understand how life is determined, controlled and passed on, but also opened the door to a new technologies.
To unlock this lesson. ABSTRACT: Dental biofilms are majorly developed by Streptococcus mutans, a cariogenic microorganism and are one of the major effects of glucosyltransferases (Gtf) produced by study was conducted to determine the antagonistic potential of probiotic bacteria against S.
mutans biofilm formation. We studied the anti-biofilm formation ability of three Lactobacillus species viz L. rhamnosus. INTRODUCTION. Streptococcus agalactiae, also known as group B Streptococcus (GBS), is a commensal Gram-positive bacterium that can transiently colonize the vagina, gastrointestinal tract, and urethra ().While GBS usually results in asymptomatic colonization in healthy adults, it is more likely to cause invasive disease in immunocompromised individuals, newborns, and the elderly.
Bacteriophages usually have a narrow host range, and the global bacteriophage population has been estimated to be on the order of 10 31, with the majority of this population turning over every few weeks (2, 3).
Additionally, bacteriophages appear to represent an enormous and unique untapped source of protein sequence diversity. DNA. Secondary structure is the set of interactions between bases, i.e., which parts of strands are bound to each other.
In DNA double helix, the two strands of DNA are held together by hydrogen nucleotides on one strand base pairs with the nucleotide on the other strand.
The secondary structure is responsible for the shape that the nucleic acid assumes. Resistance to phage nucleic acid entry, primarily via cell surface modifications, compromises bacterial fitness during antibiotic and host immune system pressure.
In this minireview, we explore the mechanisms behind phage resistance in bacterial pathogens and the physiological consequences of acquiring phage resistance phenotypes. A chemically defined medium made by adding sodium acetate and Tween 80 (a source of oleic acid) to the medium of Niven () permitted the growth of all strains of the lactic group of streptococci which dial not grow on the unsupplemented medium.
The addition of sodium acetate and Tween 80 was necessary for the growth of 22 strains of S. cremoris and 9 of 31 strains of S. lactis. In this topic section, Structure of Nucleic Acids, we will begin our discussion at a more elementary level, investigating the structure of the nucleic acids DNA and RNA.
As DNA and RNA are the major molecules of molecular biology, understanding their structure is critical to understanding the mechanisms of gene replication and protein synthesis.
Nucleic acids are the biopolymers, or large biomolecules, essential to all known forms of term nucleic acid is the overall name for DNA and RNA. They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous the sugar is a compound ribose, the polymer is RNA (ribonucleic acid); if the sugar is derived.
nucleic acids and proteins: 0: 3 american journal of medicine 34(5)& zamenof s mutations: 0: host range of certain virulent + temperate bacteriophages attacking group d streptococci: 3: 18 7: symposium on fine structure and replication of bacteria and their parts bacterial cell-wall.
Free nucleic acids are degraded in the environment and in food matrices, but short fragments can persist for considerable times outside their microbial host cell (Table 2).
Moreover, nucleic acids are additionally protected inside inactivated microorganisms, which increase their persistence even further (Table 3 and 4). For example, bacterial. Current Protocols in Nucleic Acid Chemistry is the comprehensive resource for detailed protocols related to the synthesis, modification, and analysis of modified and unmodified nucleosides, nucleotides, oligonucleotides, and nucleic acids.
Nucleic acid, naturally occurring chemical compound that is capable of being broken down to yield phosphoric acid, sugars, and organic bases. Nucleic acids are the main information-carrying molecules of the cell and play a central role in determining the inherited characteristics of every living thing.
Ullmann’sBiotechnologyandBiochemicalEngineering,Vol.1 c Wiley-VCHVerlagGmbH&,Weinheim ISBN Nucleic Acids NucleicAcids. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.
Bacteriophages: Viruses whose hosts are bacterial cells. Bacteriophage T4: Virulent bacteriophage and type species of the genus T4-like phages, in the family infects E.
coli and is the best known of the T-even phages. Its virion contains linear double-stranded DNA, terminally redundant and circularly permuted. Both nucleic acids—DNA and RNA—are polymers composed of monomers known as nucleotides, which in turn consist of phosphoric acid (H 3 PO 4), a nitrogenous base, and a pentose sugar.
The two types of nitrogenous bases most important in nucleic acids are purines —adenine (A) and guanine (G)—and pyrimidines —cytosine (C), thymine (T), and.4) Multi Loop (Junctions) – 2 or more double stranded regions converge to form a closed structure.
Structure Prediction Methods 1) Maximize Base Pairs -Determine set of maximal base pairs-Align bases based on ability to pair up to determine the optical structure-Nussinov Algorithm: 4 ways to get the optimal structure between i and j.