âMaya Angelouâ. Lithograph Special Edition, An original print by artist Lynda Lanker. A portrait of Dr. Angelou created with her blessing, this hand-printed lithograph, printed by Master Printer Mark Mahaffey of Mahaffey Fine Art, comes matted (using archival quality materials) and is ready for framing. The edition is limited to just 100 prints, each priced at $275 plus $35 shipping. - Purchase Here â.
As mentioned above, ribosomes are the molecular machines responsible for protein synthesis. A ribosome is made out of RNA and proteins, and each ribosome consists of two separate RNA-protein complexes, known as the small and large subunits.
Ribosomes are made out of two things: a small ribosomal subunit that reads the mRNA, while the large subunit joins amino acids to form a polypeptide chain. Each subunit is composed of one or more ribosomal RNA (rRNA) molecules and a variety of proteins. Eukaryotes have 80S ribosomes, each consisting of a small (40S) and large (60S) subunit. Their small subunit has a 16S RNA sub-unit (consisting of 1540 nucleotides) bound to 21 proteins. The large subunit has a 5S RNA (120 nucleotides), a 28S RNA (4700 nucleotides), a 5.8S RNA (160 nucleotides) subunits and 46 proteins.