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DNA forming a replication fork, TEM

DNA forming a replication fork, TEM

C006/9226

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50.9 MB (51.0 compressed)

4843 x 3673 pixels

40.9 x 31.0 cm ⏐ 16.1 x 12.2 in (300dpi)

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Credit

DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY

Caption

DNA replication. Transmission electron micrograph (TEM) of human DNA (deoxyribonucleic acid, dark strands) from a HeLa cancer cell, showing a stage of DNA replication. The DNA has formed into a Y-shaped molecule known as a replication fork, where the DNA has unwound into two single strands. Normally, DNA consists of two tightly wound spiral strands. During replication, a 'bubble' region forms which enlarges to form a replication fork. It is here that daughter strands form as the parent DNA acts as a template for the construction of a new matching strand. In this way the sequence of bases (or genetic information) along the DNA molecule is replicated.

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Model release not required. Property release not required.

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