a: Base pairing ~
b: passengers in the two trains shaking hands

What: "The arrangement of the strands is somewhat like two trains pointed in opposite directions, and base pairing is like passengers in the two trains shaking hands."From:"Microbiology Principles and Explorations 8th edition"page 184

Writer: Jacquelyn G. Black
Where: Reference Link Has Evaporated
Date: Jan 24 2014 8:13 PM

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