Effects of temperature oscillations on the distribution of 65Zn on cytoplasmic proteins

1. Oscillating temperatures cause an increase in 65Zn uptake into the digestive gland of M. edulis when compared with the effects of constant temperatures. 2. The increased uptake is associated with a change in the distribution of 65Zn onto cytoplasmic proteins. There is a fall in the percentage of metal on the greater than 70 K dalton fraction and a rise in the 3 K dalton fraction. 3. A possible hypothesis is produced to explain these effects in terms of heat lability of metal-protein ligands.