ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
CRISPR-CAS9 gene editing complex. Computer illustration showing the molecular structure of the CRISPR-associated protein Cas9 in complex with RNA (ribonucleic acid) and DNA (deoxyribonucleic acid, orange-fuchsia). Cas9 is a nuclease protein associated with the CRISPR (Clustered Regularly Interspersed Palindromic Repeats) adaptive immunity system in Streptococcus pyogenes and other bacteria. It uses a guide RNA sequence to cut DNA at a complementary site.
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