Recently, there has been primarily one major story involving Lactobacillus Bulgaricus; it's cell size reduction.
This has been happening because of increasingly large amounts of *RNA, (relative to the entire genome of Lactobacillus Bulgaricus. This being said, one must consider that first, Lactobacillus Bulgaricus already has a generally high RNA count in the genome. However, recently, it has been discovered that the RNA count for L. bulgaricus is much higher than any other bacteria in the Firmicutes class, as well as it is relatively much higher, in comparison to other cells of this respective genome size. Whereas this increasing amount of RNA could just be a result of the change to a lactose-rich environment, it is regardless also a sign off cell size reduction.
* What is RNA? Ribonucleic acid (RNA) is a polymer that is composed of a nitrogen base, a sugar, and a phosphate (group). RNA plays a role in translating genetic information gathered from it's counterpart DNA (deoxyribonucleic acid), acting as a messanger between DNA and ribosomes, and composing a vital part in some other ribosomes. Ribosomes are an organelle found in cells that stores genetic information.
http://en.wikipedia.org/wiki/Image:Pre-mRNA-1ysv.JPG, RNA strand
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