A previous investigation (Halvorson and Spiegelman, 1952) demonstrated that analogues of amino acids which prevent incorporation from the free amino acid pool into protein also suppress the induced synthesis of maltase in yeast cells. The data obtained led to the conclusion that the quantitatively predominant pathway of induced enzyme formation in nongrowing cells involves the utilization of th...

Amino acids are emerging as a critical component of the terrestrial N cycle, yet there is little understanding of amino acid cycling in temperate forests. This research studied the uptake and turnover of amino acid N by soil microbes and the capacity of forest trees to take up the amino acid glycine in comparison to NH4 and NO3. This research was conducted in three temperate forests located in ...

Human milk was collected from women in their 10th-14th weeks of lactation, and was analysed for amino acids. Corrections were made for losses of amino acids which were presumed to occur during acid hydrolysis, using a non-linear mathematical model that describes the simultaneous processes of amino acid yield and decay. The mean amino acid composition of the human milk was found to be similar to...

Free amino acids levels in the milk of 11 healthy Indian mothers were determined using automatic precolumn derivatization procedure. The aim of the study was to find out the relative concentration of glutamic acid and glutamine in the milk. Glutamic acid is the dominant free amino acid found in the milk of Indian mothers. Glutamic acid and glutamine together formed the major nonessential amino ...

A number of studies including those of Cornish and Block (1960) have measured the marked increase in serum enzyme levels following acute exposure to CC4 vapor. If it is assumed that these enzymes are being released from damaged tissue, one would anticipate that smaller molecular weight compounds, such as amino acids, would also be released. Increased urinary excretion of free amino acids or alt...

pea seedlings incorporate a variety of C14-amino acids into their protein. The incorporation is promoted by adenosine triphosphate, by a mixture of amino acids, by magnesium and potassium ions (5), and by the nucleosides derived from ribonucleic acid (6). Amino acid incorporation is inhibited by adenosine diphosphate, by amino acid analogues, by rubidium ions, by certain purine analogues, and b...

The free amino acids are present in tissues of animals in the postabsorptive st,ate at 3 to 9 times their concentration in the blood (1). Aspartic acid, glutamic acid, glutamine, proline, alanine, glycine, taurine, and ethanolamine phosphate contribute over two-thirds of the total free amino acid nitrogen of rat tissues (l-3). The pattern of these amino acids is, however, highly characteristic ...

Comparison of free amino acids in freshly excised rabbit lenses and in lenses taken from the contralateral eyes after storage for 24 to 48 hours reveals essentially no postmortem changes. This suggests that human eyebank lenses may be considered as normal with respect to the free amino acid pool. Analysis of senile cataractous lenses, compared to eyebank lenses, reveals a wide range of amino ac...

Comparison of free amino acids in freshly excised rabbit lenses and in lenses taken from the contralateral eyes after storage for 24 to 48 hours reveals essentially no postmortem changes. This suggests that human eyebank lenses may be considered as normal with respect to the free amino acid pool. Analysis of senile cataractous lenses, compared to eyebank lenses, reveals a wide range of amino ac...

In this study, the cDNA Growth Hormone (cGH) of the Belugasturgeon (Husohuso) and Russian sturgeon (Acipensergueldenstaedtii) were cloned and sequenced, and phylogenetic relationships were examined using nucleic acid and amino acid sequences. The nucleotide sequence of the Beluga GH has an open reading frame of 645 nucleotides encoding a protein 214 amino acid residues. The signal peptide cleav...