CAS BI 203 Lecture Notes - Lecture 6: Transfer Rna, Nucleolus, Ribozyme
7 Feb 2014
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We continue our 2497 discussion of protein translation. 2498 will look at the ribosome in detail. 2499 [00:00:11. 25] so the ribosome, the complete one here, is a very large protein complex, It has two major subunits-- the large subunit, and the small subunits. 2501 sizes are characterized by their sedimentation rate. And as you can see, that"s not a linear. 2503 [00:00:41. 28] the large subunit is comprised of approximately 49 proteins and 3 ribosomal rna. The small subunit is made up of 33 proteins and a single ribosomal rna molecule. 2505 and the mass contribution to the final weight is approximately equal between protein and. 2507 [00:01:16. 52] ribosomes are one of the most abundant proteins. In a cell in bacteria, it can be. 2508 2% to 3% of total protein mass. So the cell is always geared up for making a lot of them. 2509 [00:01:28. 96] in eukaryotes, they"re made in the special part of the nucleus called the nucleolus.
