Basophilic and eosinophilic tissue components are difficult to demonstrate by stains commonly used in light microscopy after osmium tetroxide fixa-tion. Baker (2) states that "if only chromatin were left in a state in which it could be differentially stained without difficulty, this fixative would be universally recognized as superior to all others" for light microscopy. The difficulty encounte...

Recently we discovered a topographic representation of the visual field in the temporal cortex of the owl monkey, Aotus trivirgatus, which we termed the 'middle temporal visual area' (M1)I. Such a systematic representation has not yet been demonstrated in the temporal cortex of other primates, although the probable 12 existence of MT is indicated in several other primates by fiber connection pa...

We reported earlier that the methylation of unmethylated reovirus mRNA (reo mRNAU) by the cellular methylating enzymes is impaired in extracts of uninfected, interferon-treated Ehrilich ascites tumor cells (S30INT). We find now that after the methylation of reo mRNAU has stopped in S30INT, the RNA can be reisolated and further methylated in an extract of control cells (S30C). Thus the impairmen...

When uninjured cells of Valonia are placed in methylene blue dissolved in sea water it is found, after 1 to 3 hours, that at pH 5.5 practically no dye penetrates, while at pH 9.5 more enters the vacuole. As the cells become injured more dye enters at pH 5.5, as well as at pH 9.5. No dye in reduced form is found in the sap of uninjured cells exposed from 1 to 3 hours to methylene blue in sea wat...

In the spinal ganglia of the chick embryo, two neuronal populations can be distinguished: large, early differentiating ventrolateral (VL) cells and small, late differentiating dorsomedial (DM) cells. It was found that, beginning with stage 25, the DM cells originate from a narrow band of small, immature cells at the medial border of the ganglion, extending to the dorsolateral border. We have de...

eth-1: a thermosensitive allele of the Neurospora C T U S S ~ Sadenosylmethionine (AdoMet) synthetase gene that confers ethionine resistance, has been cloned and sequenced. Replacement of an aspartic amino acid residue (D48 + N4*), perfectly conserved in prokaryotic, fungal and higher eukaryotic AdoMet synthetases, was found responsible for both thermosensitivity and ethionine resistance confer...

Bushbabies with lesions restricted to the middle temporal (MT) area and animals with larger extrastriate lesions including area MT were compared with normal control animals on tests of visuospatial localization and discrimination learning. Ablation of area MT was sufficient to produce impairments in directing behavior appropriately on the basis of visuospatial cues. Extension of the lesion into...

240 words 26 The caudal fastigial nucleus (FN) is known to be related to the control of eye 27 movements, and projects mainly to the contralateral reticular nuclei where excitatory (EBNs) 28 and inhibitory burst neurons (IBNs) for saccades exist (the caudal portion of the nucleus 29 reticularis pontis caudalis, NRPc, and the rostral portion of the nucleus reticularis 30 gigantocellularis, NRG, ...