Kirk, "Acidification of the malaria parasite's digestive vacuole by a [H.sup.+]-ATPase and a [H.sup.+] -pyrophosphatase," Journal of Biological Chemistry, vol.
Kirk, "Chloroquine resistance-conferring mutations in pfcrt give rise to a chloroquine-associated [H.sup.+] leak from the malaria parasite's digestive vacuole," Antimicrobial Agents and Chemotherapy, vol.
Kirk, "A verapamil-sensitive chloroquine-associated [H.sup.+] leak from the digestive vacuole in chloroquine-resistant malaria parasites," Journal of Cell Science, vol.
We found, however, that all four species had (1) rhodoplast digestive cells in their digestive glands and (2) rhodoplast digestive cells that appeared to be involved ultrastructurally with the digestion of rhodoplasts since fragments of rhodoplasts were found in their digestive vacuoles. The presence of rhodoplasts in rhodoplast digestive cell vacuoles of all four sea hare species also suggested that an appropriate dietary precursor, red algae, was available for colored ink production in all four species.
dolabrifera did not, therefore, appear to be due to either the absence of rhodoplast digestive cells in the digestive gland or a lack of rhodoplasts in their digestive vacuoles. In addition, phycobilisome-sized particles were observed in the digestive vacuoles of rhodoplast digestive cells of D.
This implied that the rhodoplast digestive cell, in particular the digestive vacuoles in this cell type, was not functioning in a fashion similar to those in A.