ahhh, the sweet sitting of work. the early morning when nothing has come in and no one really has anything to do. well, for me anyways, all those other people have to plan, i’m more of a reactionary worker. when something pops up, i react, but otherwise i lie dormant, waiting for a signal to work.
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Mo’ Bio Corner:
speaking of signals, i read this paper today about miRNAs (micro RNAs) that have been recently discovered across a couple model organisims, as well as other well studied kinds. RNA is facinating stuff, made of similar components as DNA, but with a base difference. RNA doesn’t have thymine, instead it has uracil, similar hydrogen bonds, but different arrangment of molecules, supposedly to keep DNA and RNA from getting mixed up. Recent forays into RNA has lead to startling discoveries, and that RNA may be used for a lot more than just a template for proteins.
For recent genetic studies, a new type of tinkering was discovered about 15 years ago called RNAi (RNA interference). In this process, double stranded RNA that is anti-sense to a specific DNA sequence will bind to these DNA sequences thus rendering them unable to expressed. These RNA strands are pretty short, from a dozen to a couple dozen base pairs in length. Although it was discovered 15 years ago, it has really started to take off in the past 4 years or so.
So now they have these miRNA which are activley transcribed by DNA to prevent other genes from being expressed. Because RNAi was something induced in an organisim by analysis of its genetic code, finding mechanisims for this in multiple organisims points to a much more complex role of RNA in development and in biological systems in general. A good portion of DNA and RNA that is floating around in cells was thought to be “junk” genetic material, floating around until it is reclaimed to be used in repair or transcription of genes.
Its amazing that no matter how complex the human body seems, there is some new layer waiting to be discovered. There is so much to be discovered in this day and age, and the tools we are developing are allowing for the elucidation of so much more than couldn’t have been done 5 years ago. RNAi holds much promise as a alternative, or somethign to support gene therapy. Instead of removing or altering a harmful gene, you can just silence it with a small piece of RNA, which can easily be broken down in the body, but can still be extremely effective genetic regulation.
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that really felt good. I’m going to try and start doing more stuff like this, mostly because i find this stuff fascinating, and it helps me refresh and understand this stuff better by writing it down. people reading this might actually get something out of their vist here as well, instead of reading about my problems. I’m calling it the Mo’ Bio Corner because MoBio is short for molecular biology, and the obvious slang connotation. I’m so very clever.