Compilation of A. nidulans mutants listing names, affected enzymes (or gene functions), linkage assignments, properties of the mutants, and names of corresponding loci in N. crassa. - [Read Aspergillus nidulans Mutants]
Forward genetics is used to identify genes that are involved in particular biological processes. For example, genes required for disease resistance can be found by identifying mutants with reduced or increased disease resistance, genes that control flower development can be identified by searching for mutants with altered flower morphology, and genes encoding enzymes for tryptophan biosynthesis can be identified by searching for mutants that require exogenous tryptophan for growth. - [Read Forward Genetics in Arabidopsis: Finding Mutations that Cause Particular Phenotypes Protocol]
Compendium of protocols for using Aspergillus nidulans in genetic, molecular, and cell biological investigations, originally written for members of my research group. It also summarizes our common growth media and nutritional supplements, many of which originally appeared elsewhere but now are difficult to locate. Includes: Growth and storage of Aspergillus nidulans conidia; Nutritional supplements for our common auxotrophies; Double mutants; Mitotic mapping - assigning genes to chromosomes; etc - [Read Fundamentals of Growth, Storage, Genetics and Microscopy of Aspergillus nidulans Protocols]
In this method, the nuclease BAL 31 is used to make uni- or bidirectional deletions in a segment of cloned DNA. BAL 31 is a complex enzyme and tends to digest a population of double-stranded DNA targets in an asynchronous fashion, Deletions created by BAL 31 are therefore far more heterogeneous in size than those created by processive enzymes such as exonuclease III. - [Read Generation of Bidirectional Sets of Deletion Mutants by Digestion with BAL 31 Nuclease Protocol]
The double-stranded DNA of recombinant plasmid, phagemid, or bacteriophage M13 replicative form DNA is digested with two restriction enzymes whose sites of cleavage both lie between one end of the target DNA and the binding site for universal primer. The enzyme that cleaves nearer the target sequence must generate either a blunt end or a recessed 3' terminus; the other enzyme must generate a four-nucleotide protruding 3' terminus. - [Read Generation of Sets of Nested Deletion Mutants with Exonuclease III Protocol]
How to Use Asci for Obtaining Double Mutants- http://www.fgsc.net/neurosporaprotocols/How%20to%20use%20asci%20for%20obtaining%20double%20mutants%20of%20genes%20that%20show%20epistasis%20of%20are%20phenotypically%20similar.pdf
How to Use Helper Strains for Maintaining and Crossing Handicapped Recessive Mutants- http://www.fgsc.net/neurosporaprotocols/How%20to%20use%20helper%20strains%20for%20maintaining%20and%20crossing%20handicapped%20recessive%20mutants,%20for%20forcing%20and%20resolving%20heterokaryons,%20and%20for%20determining%20heterokaryon%20compatibility
Protocol for hydroxylamine mutagenesis of plasmid DNA is ideal for random mutagenesis of plasmid DNA which is then used in a plasmid shuffle or screen for ts mutants. - [Read Hydroxylamine Mutagenesis of Plasmid DNA Protocol]
Protocol for in vitro mutagenesis using double-stranded DNA templates. Two oligonucleotides are used to prime DNA synthesis catalyzed by a high-fidelity thermostable polymerase on a denatured plasmid template. The two oligonucleotides both contain the desired mutation and occupy the same starting and ending positions on opposite strands of the plasmid DNA. - [Read In Vitro Mutagenesis Using Double-stranded DNA Templates: Selection of Mutants with DpnI]
Protocol used chiefly to generate large stocks of double-stranded DNA of strains of M13 that are routinely used as cloning vectors. Large amounts of single-stranded DNA of an individual recombinant may occasionally be needed for specific purposes, e.g., to generate many preparations of a particular radiolabeled probe or to construct large numbers of site-directed mutants. - [Read Large-scale Preparation of Single-stranded and Double-stranded Bacteriophage M13 DNA Protocol]
To image early cleavages and chromatin dynamics, it is convenient to use histone H2B fused to GFP or lamin::GFP. Time-lapse movies can be obtained using conventional confocal microscope systems and their included software. Early embryos dissected from transgenic hermaphrodites are placed with egg salts on agar pads. Chromatin dynamics can be followed easily, and wild-type embryonic cells can be compared with mutants or RNAi-treated embryos. - [Read Protocol Live Imaging of Caenorhabditis Elegans]
RAPD is a procedure for typing and fingerprinting isolates of a species. It can be used for epidemiological studies, such as investigations into hospital outbreaks and as a laboratory aid to keep track of cultures and to verify that mutants generated in the laboratory are genetically identical to the parental strain. In our hands, the use of one primer, R108, is sufficiently discriminatory to distinguish between the isolates of different strains. - [Read Random Amplification of Polymorphic DNA (RAPD) Typing and Fingerprinting Protocol]
Arabidopsis can be stably transformed using Agrobacterium tumefaciens-mediated transfer of T-DNA. We describe the generation of transgenic plants via root transformation in tissue culture, which can be useful for transforming sterile mutants. - [Read Root Transformation of Arabidopsis Protocol]
Telomere length can vary from strain to strain and is sensitive to a variety of mutants affecting DNA and chromosome function. Includes: Gel Protocol; Southern blot using oligo probe. - [Read Telomere Length Determination Protocol]
This protocol describes the electroporation of the BMH 81-17 mut S strain that is recommended for tranformation of the site directed mutagenesis of dsDNA (See Protocol on Site-Directed Mutagenesis on Double Stranded DNA). BMH 81-17 mut S are a mismatch repair defective (mut S) Escherichia coli strain. The probability that the two mutations will cosegregate during the first round of DNA replication is increased in this strain.