by Christoph — Worry not, this is no lengthy con­tem­pla­tion on the use of clas­si­cal Latin in sci­en­tific lan­guage. It's a not-so-short piece to em­pha­size that it makes sense to mark the ends of non-branched poly­mers like DNA and RNA, and thereby de­fine their chem­i­cal di­rec­tion­al­ity. Bioin­for­mati­cians who rou­tinely work with DNA and RNA in fasta...