Fig. 1

Prokaryotes
Sedimentation (S)	RNA (S)	# Proteins
30S	16S	21
50S	23S 5S	34
combined = 70S
Eukaryotes
Sedimentation (S)	RNA (S)	# Proteins
40S	18S	30
60S	28S 5.8S 5S	45
combined = 80S

* S = Svedberg units which indicate the rate of sedimentation when centrifuged. Generally, the larger the number, the larger the particle.

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