Thursday 2 June 2016

biochemistry - Why do 60S & 40S ribosomal subunits make an 80S ribosome (not 100S)?


Why do 60S & 40S subunits make an 80S (not 100S) ribosome and, similarly, 50S & 30S make 70S? 60+40 is not equal to 80, nor is 50+30 equal to 70, so why are the subunits of the 80S and 70S ribosomes named so weirdly? I couldn't come up with any other mathematical explanation.




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