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Denotes the shorter of the two chromosome arms, e.g. human 14p is the short arm of human chromosome 14.
- Browse Related Terms: double crossing-over, isochromosome, metacentric chromosome, p, q, sister chromatid exchange
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A Drosophila transposon.
- Browse Related Terms: composite transposon, FLAG, gene machine, Movable genetic element, P element, purification tag, transposable (genetic) element, transposition
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Abbreviation for peptidyl-tRNA binding site.
- Browse Related Terms: aminoacyl site, exit site, Mitochondrial DNA, P-site, peptidyl-tRNA binding site, short interspersed nuclear element, transfer RNA, Transfer RNA (tRNA)
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Generational symbols for the two parents of a given individual.
- Browse Related Terms: allozygote, antagonist, co-transformation, complementation test, dihaploid, dimorphism, essential derivation of varieties, F2, genet, genetic heterogeneity, genetic variation, germplasm, intragenic complementation, isogenic, mass selection, maternal effect, negative selection, P1, P2, provenance, selection response, sub-strain, twin
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A human tumour-suppressor transcription factor gene, damage or mutation to which is believed to be responsible for up to 60% of all human cancer tumours. If, in spite of the presence of p53 protein, a cell begins to divide uncontrollably following damage to its DNA, the p53 gene acts to prevent tumours by triggering apoptosis.
- Browse Related Terms: antisense gene, attenuation, attenuator, catabolite repression, cell-free transcription, constitutive promoter, Control elements, derepression, downstream, gratuitous inducer, Homeobox, inducible, induction, operator, p53 gene, polar mutation, pre-mRNA, read-through, RNA editing, sense RNA, silencing
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A mid-prophase stage in the first meiotic division, between zygonema and diplonema. Chromosomes appear as long, paired threads. Occasionally all four chromatids can be recognized.
- Browse Related Terms: asynapsis, bivalent, chiasma, diplotene, meiotic analysis, pachynema, pairing, quadrivalent, recombination, Synapsis, synaptonemal complex, terminalization, unequal crossing over, zygonema
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(adj.) See: pachynema.
- Browse Related Terms: Biological diversity, catalytic RNA, cell membrane, cross-over, ecological diversity, gene shears, heterotrophic, leptotene, pachytene, photoheterotroph, plasma membrane, pluripotent, totipotent, zygotene
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A cell line designed to produce viral particles that do not contain nucleic acid. After transfection of these cells with a full-size viral genome, fully infective viral particles are assembled and released.
- Browse Related Terms: defective virus, fusogenic agent, heteropyknosis, interferon, Logarithmic phase (log or exponential growth phase), lytic, lytic cycle, packaging cell line, stationary phase, synchronous culture, temperate phage
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(Abbreviation: PCV). The proportion of a cell culture volume that is occupied by cells. Cell volume is determined by sedimenting using low speed centrifugation.
- Browse Related Terms: amniocentesis, autologous cells, baculovirus expression vector, batch fermentation, cell number, co-transfection, culture alteration, established culture, Fibroblast, harvesting, immortalizing oncogene, micronutrient, packed cell volume, passage number, passage time, plaque, plating efficiency, primary culture, sub-culture interval, sub-culture number
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Abbreviation for polyacrylamide gel electrophoresis.
- Browse Related Terms: DGGE, Gel electrophoresis, iso-electric focusing gel, PAGE, PFGE, pulsed-field gel electrophoresis, single nucleotide polymorphism, TGGE
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A gene that influences the formation of body segments in Drosophila.
- Browse Related Terms: Drosophila melanogaster, Joining (J) segment, joining segment, major histocompatibility complex, pair-rule gene, recombinant toxin, segment-polarity gene, T cell receptor, tribrid protein
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The pairing of homologous chromosomes during the prophase of the first meiotic division. Pairing is the first prerequisite before crossing over and recombination can occur. Synonym: synapsis.
- Browse Related Terms: asynapsis, bivalent, chiasma, diplotene, meiotic analysis, pachynema, pairing, quadrivalent, recombination, Synapsis, synaptonemal complex, terminalization, unequal crossing over, zygonema
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The study of the fossil record of past geological periods and of the phylogenetic relationships between extinct and contemporary plant and animal species.
- Browse Related Terms: palaeontology, Paleontology, Rhizobia, Rhizobium
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The study of the fossil record of past geo- logical periods and of the phylogenetic relationships between ancient and contemporary plant and animal species.
- Browse Related Terms: palaeontology, Paleontology, Rhizobia, Rhizobium
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A segment of double-stranded DNA, in which the order of bases, read 5'?3' in one strand, is the same as that in the complementary antiparallel strand, also read 5'?3'. If the sequence is written in the normal convention, on two lines with paired bases shown one above the other, the base order on one strand runs in the opposite direction to that on the complementary strand. They are often found at the ends of transposable elements, and recognition sites for type II restriction endonucleases are also palindromes. Synonym: inverted repeat.
See Palindromic sequence.
- Browse Related Terms: Base pair, beta-DNA, complementary, Complementary DNA or RNA, complementary entity, Denature, denatured DNA, DNA, DNA (deoxyribonucleic acid), double helix, ethidium bromide, helix, intercalating agent, kilobase, kilobase pairs, melting temperature, mismatch, Nucleic acid, Palindrome, single-stranded nucleic acid, supercoil, Viroid, Z-DNA
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A DNA locus whose 5'-to-3' sequence is identical on each DNA strand. The sequence is the same when one strand is read left to right and the other strand is read right to left. Recognition sites of many restriction enzymes are palindromic. See DNA.
- Browse Related Terms: antiparallel orientation, antisense DNA, blunt end, blunt-end ligation, chromatin fibre, cos ends, DNA helicase, dscDNA, dsDNA, duplex DNA, gap, gapped DNA, heteroduplex, homoduplex DNA, ligate, ligation, M13, M13 strand, nick, non-template strand, Palindromic sequence, provirus, replication fork, S1 mapping, single-strand DNA binding protein, staggered cuts, template strand, Virus
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Elongated cells found just beneath the upper epidermis of leaves, typically rich in chloroplasts.
- Browse Related Terms: DNA delivery system, doubling time, ethylenediamine tetraacetic acid, export, generation time, haemoglobin, palisade parenchyma, sex duction
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Ampicillin-resistant plasmid developed for this laboratory course. (See Plasmid.)
Ampicillin-resistant plasmid.
- Browse Related Terms: apomixis, artificial seed, Bt corn, Conversion, epicotyl, macrospore, megagametophyte, pAMP, vivipary
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Aseptic culture of immature panicle explants to induce microspore germination and development.
- Browse Related Terms: anther culture, boring platform, explant donor, hairy root culture, indirect embryogenesis, indirect organogenesis, panicle culture, primary growth, protocorm, stock plant