Michael Mecca

Learn More
Feature structures are related to frames in artiicial intelligence and to record structures in many programming languages. They are widely used as a data structure for natural language processing and their formalizations often include multiple inheritance and subtyping, which allow for terser descriptions and a logical control over non-determinism during(More)
Changes in the organization of membranous structures in the amphibian oocyte cortex were studied during the process of progesterone-induced meiotic resumption. Progesterone treatment of Xenopus laevis oocytes induced short term and longer term changes in the cortical membranes. In the short term, progesterone induced a burst of endocytosis mediated through(More)
Proteins in oocytes, meiotically mature eggs and zygotes of Xenopus laevis were examined to determine whether proteins in the peripheral region differ from those in the central region of these cells. We show that different regions contain different amounts of newly synthesized proteins and that during meiotic maturation and fertilization the periphery of(More)
  • 1