| pubmed-article:639099 | pubmed:abstractText | The fine structure of the cytolemma of olfactory receptor cells in the newt was studied by the freeze-fracture replica method. Two kinds of receptor cells were recognized, namely ciliated cells (ciliary type) and non-ciliated cells (microvilli type). The cytolemma of olfactory knobs as well as their processes from both types of receptor cells showed an abundance of large membrane particles 80 approximately 110 A in diameter. The large square aggregation of membrane particles, 0.1 x 0.1 micron to 0.2 x 0.3 micron in size, consisting of 50 approximately 100 cuboidal subunits, were found in the cytolemma of the dendrite. A structural model of aggregation is presented. The soma of the receptor cell revealed large pitted membrane particles about 140 A in diameter. These particles are possibly the morphologic counterpart to ionophores which have been proposed by electrophysiological studies. | lld:pubmed |
