This item sold on May 2, 2013.
Cytosine and guanine are two of the four nucleic acids that make up our DNA, the C and G of A, T, C, and G. Hydrogen bonds are the forces that hold our molecules of DNA together, and while an A-T bond has only two hydrogen bonds keeping them together, a C-G bond has three.
Your 3.5" x 5" card will come with a matching blue OR green envelope. Please indicate or preference, or you will receive whatever gets pulled out of the random color generator. Off-white also available upon request.
Each card was lovingly printed on a century-old Chandler and Price letterpress machine. Unlike today's standard forms of printing, letterpress provides a rich textural experience due to the physical impression of an inked surface into the paper--printed areas have a smooth sheen that plays nicely against the backdrop of subtly textured paper.
Letterpress was the everyday form of printing text from its invention by Johannes Gutenberg in the mid-15th century until the 19th century--think movable lead type. Today, advances in photopolymer chemistry allows printers to easily convert digit images to the physical plates used on these antique machines. Yay science!
I welcome international buyers! Just convo me for a shipping quote.