The left stamp depicts the 1962 Nobel Prize recipients for the discovery of the double helix of DNA. The solving of double helix structure was partly based on the X-ray diffraction image on DNA (shown on the left stamp). The right stamp depicts the 1978 Nobel Prize recipients for breaking the DNA codes.
In DNA structure, base adenine (A) is always paired with base thymine (T) and base cytosine (C) is always paired with base guanine (G). This stamp sheetlet has a perfect composition to show the base pairing of DNA.
Below are a few stamps which have image of double helix DNA structure.
The double helix DNA attributes to chromosomes (in other words, chromosomes consist of DNA), and this information is well presented by the stamp below.
The methods of DNA sequencing (to read the order of bases in the double helix DNA structure or to read genetic codes of the DNA/gene) were developed in 1970s. Two methods were developed - Maxam Gilbert method and Sanger method. However, only Sanger method is adopted as a common approach for DNA sequencing. In fact, the DNA sequencing of human genome (completed in 2003) was done using Sanger method. The stamps below depict the Sanger DNA sequencing.
The chromatogram of DNA sequences is shown at the top right corner of the stamp
The two stamps depict the double helix DNA structure and the location of DNA in the chromosomes. However, the interesting part of these stamps is the stamp gutter showing the chromatogram of DNA sequences.