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Lily mitosis 02
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A light microscope image of a cell from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media
Culex quinquefasciatus mosquito larvae
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Mosquito larvae with genes edited by CRISPR swimming in water. Valentino Gantz, University of California, San Diego. View Media
CRISPR Illustration Frame 3
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This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. National Institute of General Medical Sciences. View Media
Planarian stem cell colony
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Planarians are freshwater flatworms that have powerful abilities to regenerate their bodies, which would seem to make them natural model organisms in which to study stem cells. Peter Reddien, Whitehead Institute View Media
Genetically identical mycobacteria respond differently to antibiotic 1
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Antibiotic resistance in microbes is a serious health concern. So researchers have turned their attention to how bacteria undo the action of some antibiotics. Bree Aldridge, Tufts University View Media
A multicolored fish scale 2
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Each of the tiny colored specs in this image is a cell on the surface of a fish scale. Chen-Hui Chen and Kenneth Poss, Duke University View Media
Central dogma, illustrated (with labels)
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DNA encodes RNA, which encodes protein. DNA is transcribed to make messenger RNA (mRNA). The mRNA sequence (dark red strand) is complementary to the DNA sequence (blue strand). Crabtree + Company View Media
Repairing DNA
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Like a watch wrapped around a wrist, a special enzyme encircles the double helix to repair a broken strand of DNA. Tom Ellenberger, Washington University School of Medicine View Media
Xenopus laevis egg
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Xenopus laevis, the African clawed frog, has long been used as a model organism for studying embryonic development. Michael Klymkowsky, University of Colorado, Boulder View Media
Lily mitosis 05
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A light microscope image of a cell from the endosperm of an African globe lily (Scadoxus katherinae). This is one frame of a time-lapse sequence that shows cell division in action. Andrew S. Bajer, University of Oregon, Eugene View Media
Induced stem cells from adult skin 01
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These cells are induced stem cells made from human adult skin cells that were genetically reprogrammed to mimic embryonic stem cells. James Thomson, University of Wisconsin-Madison View Media
Chromosome inside nucleus
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The long, stringy DNA that makes up genes is spooled within chromosomes inside the nucleus of a cell. Crabtree + Company View Media
CRISPR illustration
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This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. National Institute of General Medical Sciences. View Media
Pulsating response to stress in bacteria
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By attaching fluorescent proteins to the genetic circuit responsible for B. subtilis's stress response, researchers can observe the cells' pulses as green flashes. Michael Elowitz, Caltech University View Media
CRISPR Illustration
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This illustration shows, in simplified terms, how the CRISPR-Cas9 system can be used as a gene-editing tool. National Institute of General Medical Sciences. View Media
Fluorescence in situ hybridization (FISH) in mouse ES cells shows DNA interactions
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Researchers used fluorescence in situ hybridization (FISH) to confirm the presence of long range DNA-DNA interactions in mouse embryonic stem cells. Kathrin Plath, University of California, Los Angeles View Media
From DNA to Protein
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Nucleotides in DNA are copied into RNA, where they are read three at a time to encode the amino acids in a protein. Many parts of a protein fold as the amino acids are strung together. Crabtree + Company View Media
RNA strand (with labels)
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Ribonucleic acid (RNA) has a sugar-phosphate backbone and the bases adenine (A), cytosine (C), guanine (G), and uracil (U). Featured in The New Genetics. Crabtree + Company View Media
Induced stem cells from adult skin 03
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The human skin cells pictured contain genetic modifications that make them pluripotent, essentially equivalent to embryonic stem cells. James Thomson, University of Wisconsin-Madison View Media
Developing zebrafish fin
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Originally from the waters of India, Nepal, and neighboring countries, zebrafish can now be found swimming in science labs (and home aquariums) throughout the world. Jessica Plavicki View Media
RNA strand
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Ribonucleic acid (RNA) has a sugar-phosphate backbone and the bases adenine (A), cytosine (C), guanine (G), and uracil (U). Crabtree + Company View Media
HIV enzyme
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These images model the molecular structures of three enzymes with critical roles in the life cycle of the human immunodeficiency virus (HIV). Amy Wu and Christine Zardecki, RCSB Protein Data Bank. View Media
Mitotic cell awaits chromosome alignment
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During mitosis, spindle microtubules (red) attach to chromosome pairs (blue), directing them to the spindle equator. View Media
