The Difference Absorption Spectrum of Myosin Induced by Adenosine Triphosphate, Adenosine Diphosphate, and Inorganic Pyrophosphate

1972 ◽  
Vol 71 (2) ◽  
pp. 351-353 ◽  
Author(s):  
Hidenori YOSHINO ◽  
Fumi MORITA ◽  
Koichi YAGI
Keyword(s):  
Absorption Spectrum ◽  
Adenosine Triphosphate ◽  
Adenosine Diphosphate ◽  
Inorganic Pyrophosphate ◽  
Difference Absorption Spectrum ◽  
The Difference ◽  
Difference Absorption

scholarly journals DERIVED PHOTOSENSITIVE PIGMENTS FROM INVERTEBRATE EYES

1943 ◽  
Vol 26 (4) ◽  
pp. 361-367 ◽  
Author(s):  
Alfred F. Bliss
Keyword(s):  
Absorption Spectrum ◽  
Spectral Sensitivity ◽  
Blue Crab ◽  
Horseshoe Crab ◽  
Light Sensitivity ◽  
Red Pigment ◽  
Difference Absorption Spectrum ◽  
Light Stability ◽  
The Difference ◽  
Difference Absorption

The red pigment in the eyes of the squid, blue crab, and horseshoe crab becomes photosensitive when treated with formalin, and bleaches in the light. The resulting change in density is approximately symmetrical around a maximum at 480 mµ in the blue green. This difference absorption spectrum is in rough agreement with the spectral sensitivity of the cephalopod eye and differs only slightly from the difference absorption spectrum of vertebrate visual purple. The formalin-sensitized pigment is not melanoid. Its bleaching in squid retinas releases large quantities of retinene. It is suggested that the light sensitivity of the normal squid photopigment may be independent of its light stability.

scholarly journals THE REACTION BETWEEN ACTOMYOSIN AND ADENOSINE TRIPHOSPHATE

1948 ◽  
Vol 31 (4) ◽  
pp. 361-375 ◽  
Author(s):  
W. F. H. M. Mommaerts
Keyword(s):  
Enzymatic Hydrolysis ◽  
Adenosine Triphosphate ◽  
Adenosine Diphosphate ◽  
Myosin Atpase ◽  
Recovery Effect ◽  
Inorganic Pyrophosphate ◽  
Atp Concentration ◽  
Initial Drop

1. A study is made of the effect of adenosine triphosphate (ATP) upon the viscosity of solutions of actomyosin in 0.5 M KCl. 2. The observed effects are discussed in terms of an initial drop of the viscosity (viscosity response) and its subsequent slow reversal (recovery effect). The latter is ascribed to a decrease in the ATP concentration through enzymatic hydrolysis. 3. The recovery effect is inhibited by Mg, activated by Ca, in accordance with the effect of these ions on the activity of myosin-ATPase. 4. The viscosity response is not inhibited, probably promoted by Mg. It is not promoted, probably inhibited by Ca. 5. The viscosity response is induced not only by ATP, but to a certain extent also by inosinetriphosphate, inorganic triphosphate, and inorganic pyrophosphate, not by adenosine diphosphate or monophosphate. 6. The viscosity response could be obtained with enzymatically inactive myosin. 7. It is concluded that the effect of ATP upon myosin does not depend on its enzymatic hydrolysis.

STRUCTURAL CHANGES OF ISOLATED RAT PERITONEAL MAST CELLS INDUCED BY ADENOSINE TRIPHOSPHATE AND ADENOSINE DIPHOSPHATE

1968 ◽  
Vol 16 (11) ◽  
pp. 707-716 ◽  
Author(s):  
BERTIL DIAMANT ◽  
PER GÖRAN KRÜGER
Keyword(s):  
Mast Cells ◽  
Histamine Release ◽  
Adenosine Triphosphate ◽  
Structural Changes ◽  
Adenosine Diphosphate ◽  
Local Application ◽  
Peritoneal Mast Cells ◽  
Rat Peritoneal Mast Cells ◽  
The Difference ◽  
Releasing Effect

Procedures for the local application of chemical agents to individual rat peritoneal mast cells are described. The local application of adenosine triphosphate (ATP) to the mast cell surface did not induce degranulation of the cell, a process known to occur concomitantly with histamine release induced by compound 48/80 and antigen-antibody reactions. Instead, reversible configurational changes of the cell membrane gradually occurred without any striking changes in the over-all cell volume. Swelling was observed after incubation of mast cells with ADP as well as by intracellular electrical manipulations with pipettes filled with H3PO4. The reversal of swelling was also demonstrated. The results are discussed in relation to the known histamine-releasing effect of ATP on rat mast cells and the difference in the mechanisms of histamine release induced by ATP and degranulating agents are stressed.

Heparin from Intestine and Lung Source Administered in Large Dose to Dogs with Acute Myocardial Ischemia

1978 ◽  
Vol 40 (02) ◽  
pp. 407-417
Author(s):  
Michael J Saliba ◽  
Richard J Pavalec
Keyword(s):  
Coronary Artery ◽  
Myocardial Ischemia ◽  
Adenosine Triphosphate ◽  
Intestinal Mucosa ◽  
Large Dose ◽  
Acute Myocardial Ischemia ◽  
Ischemic Myocardium ◽  
Atp Levels ◽  
Initial Control ◽  
The Difference

SummaryIntestinal mucosa heparin (IMH) and beef lung heparin (BLH) were infused into dogs subjected to myocardial ischemia by intermittent coronary artery occlusions. The IMH was from a mixture of beef, sheep, and pig intestinal mucosa. Initial control occlusion and recovery was followed by a second occlusion with 60,000 units of IMH or BLH added. Electrocardiographic S-T segment elevations (ST) were measured acutely. There were no significant differences in ST in non-ischemic myocardium before occlusions or with occlusions. In ischemic myocardium, IMH significantly lowered control ST 84% in amount (t = 6.1 p <0.00005), and 76% in number (t = 11.6 p <0.00001). BLH lowered control ST a significant, lesser, 36% in amount (t = 3.6 p <0.008), and 35% in number (t = 3.2 p <0.01). The difference between IMH and BLH in ischemic myocardium was a significant 48% in amount (t = 4.0 p <0.0007), and 41% in number (t = 2.0 p <0.06). Myocardial adenosine triphosphate (ATP) levels were assayed after 90 min. ATP levels were 31% higher in both ischemic and non-ischemic myocardium in IMH-treated dogs than in BLH- treated. It was concluded that IMH and BLH are functionally different, and IMH was significantly more effective.

Selective sensing of adenosine monophosphate (AMP) over adenosine diphosphate (ADP), adenosine triphosphate (ATP), and inorganic phosphates with zinc(II)-dipicolylamine-containing gold nanoparticles

2021 ◽  
Author(s):  
Lena Reinke ◽  
Marcus Koch ◽  
Christine Müller-Renno ◽  
Stefan Kubik
Keyword(s):  
Gold Nanoparticles ◽  
Adenosine Triphosphate ◽  
Triethylene Glycol ◽  
Adenosine Monophosphate ◽  
Adenosine Diphosphate ◽  
Mixed Monolayer ◽  
Inorganic Phosphates

Mixed monolayer-protected gold nanoparticles containing surface-bound triethylene glycol and dipicolylamine groups aggregated in water/methanol, 1:2 (v/v) in the presence of nucleotides, if the solution also contained zinc(II) nitrate to convert...

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