Abstract

1. 1. Fructose-bisphosphate aldolase from Helix pomatia is a tetramer of 40,000 mol. wt. sub-units like mammalian aldolases. 2. 2. The snail enzyme differs slightly in amino acid composition from mammalian aldolases and has glycine as its amino terminus rather than proline. 3. 3. Spectroscopic measurements (u.v., fluorescence, ORD, CD) show small yet definite differences in secondary structure between the snail and mammalian aldolases but indicate thaT no major structural changes have occurred during evolution.

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