The upcoming discussion will update you about the difference between Chloroplast Ribosomes and Cytosol Ribosomes.
Difference # Chloroplast Ribosome:
i. Sedimentation coefficient is 70S.
ii. Initiation of amino acid takes place by formyl methionine for protein synthesis like the bacteria.
iii. Sedimentation coefficient of large and small sub-units is 50S and 30S, respectively.
iv. Sedimentation coefficient of ribosomal RNAs of large sub-unit is 23S, 5S and 4.5S.
v. Sedimentation coefficient of ribosomal RNAs of small sub-unit is 16S.
Difference # Cytosol Ribosome:
i. Sedimentation coefficient is 80S.
ii. Here it starts from methionine.
iii. Sedimentation coefficient of large and small sub-units is 60S and 40S. respectively.
iv. Same for its large sub-unit is 25S. 5.8S and 5S.
v. Same for small sub-unit is 18S.