Posts Tagged ‘Biology’

Multispectral Chiral Imaging with a Metalens.

Saturday, January 6th, 2018

The title here is from an article on metalenses[cite]10.1021/acs.nanolett.6b01897[/cite] which caught my eye.

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A form of life that can stably store genetic information using a six-letter, three-base-pair alphabet?

Saturday, December 2nd, 2017

For around 16 years, Floyd Romesberg’s group has been exploring un-natural alternatives (UBPs) to the Watson-Crick base pairs (C-G and A-T) that form part of the genetic code in DNA. Recently they have had remarkable success with one such base┬ápair, called X and Y (for the press) and dNaMTP and d5SICSTP (in scholarly articles).[cite]10.1073/pnas.1708259114[/cite],[cite]10.1073/pnas.1205176109[/cite] This extends the genetic coding from the standard 20 amino acids to the possibility of up to 172 amino acids. Already, organisms engineered to contain X-Y pairs in their DNA have been shown to express entirely new (and un-natural) proteins.

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