Scientist examining DNA sequencing autoradiogram against a light box. Each group of four strips represents the nucleotide sequence of AGCT (Adenine-Guanine-Cytosine-Thymine) in the DNA of the nematode worm,Onchocerca volvulus,a human parasite responsible for cutaneous onchocerciasis and river blindness in tropical countries | |
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Crédit: | Science Photo Library / Stammers, Sinclair |
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