Basic steps of genetic engineering. In step 1, a gene of interest consisting of a finite sequence of nucleotides synthesized one nucleotide at a time resulting in a double-stranded DNA linear sequence ...

Linear sequences for seed plants Scientists have been working out the best way to arrange plant specimens in herbaria and other collections so that their order best reflects evolutionary ...

PNAS is the world's most-cited multidisciplinary scientific serial. It publishes high-impact research reports, commentaries, perspectives, reviews, colloquium papers, and actions of the Academy. In ...

I have proposed several techniques for analyzing and representing thematic structures and complexity. Since these techniques are operatively defined, I began by considering a text to be a linear ...