Results 261 to 270 of about 9,256,330 (314)

Thiol groups in hemocyanins

Comparative Biochemistry and Physiology, 1965
Abstract 1. 1. The total sulfhydryl groups and the number of free SH groups of hemocyanins from different sources has been determined. Hemocyanins are well characterized by their content of “half cystine”, much more than by the content of any other amino acid. 2. 2.
A, Ghiretti-Magaldi, C, Nuzzolo
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On the Reactivity of the Thiol Group of Thiolsubtilisin

European Journal of Biochemistry, 1973
The reaction of thiolsubtilisin with iodoacetamide shows that in the alkaline pH‐range the –SH group of the enzyme reacts like a simple thiol compound such as mercaptoacetate. On the other hand, around neutral pH the enzyme displays enhanced reactivity compared with that of mercaptoacetate.
László Polgár, Piroska Halász, Ernó Moravcsik   +2 more
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Thiol Groups and Morphogensis

Nature, 1959
WE have recently shown1,2 that β-mercaptoethanol (a strongly reducing –SH-containing substance) markedly inhibits morphogenetic movements (gastrulation, closure of neural plate) in amphibian eggs. The oxidized counterpart of β-mercaptoethanol (dithiodiglycol) produces a thickening of the neural plate; the same type of abnormalities can be obtained with
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Mercaptobenzothiazole allergenicity—role of the thiol group

Cutaneous and Ocular Toxicology, 2008
The rubber accelerator, 2-mercaptobenzothiazole (MBT), is known to cause allergic contact dermatitis (ACD), but the mechanism is unknown. The role of the thiol group in MBT's allergenicity was investigated in the present study. Guinea pigs were sensitized to MBT using a modified guinea pig maximization test (GPMT) and reactivity was assessed toward 2 ...
Itai, Chipinda, Xing-Dong, Zhang, Reuben H, Simoyi, Paul D, Siegel   +3 more
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The thiol groups of jack bean urease

Archives of Biochemistry and Biophysics, 1970
Abstract In aqueous buffer solutions both NEM and DTNB rapidly react with 26–28 SH groups per native urease molecule with no loss of enzymatic activity. Titration of a further 7–9 SH groups by either reagent is less rapid and is accompanied by inactivation.
A T, Andrews, F J, Reithel
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Essential Role of Thiol Groups in Carboxylase

Nature, 1952
ESSENTIAL thiol groups of enzymes are usually detected by the inactivation of the enzyme with sulphydryl reagents, such as substances forming mercaptide, or oxidizing or alkylating substances1. Yeast carboxylase seems to be affected in a rather uneven and contradictory way by sulphydryl group detectors since 4-aminophenyldichloroarsine2, p ...
A O M, STOPPANI, A S, ACTIS, J O, DEFERRARI, E L, GONZALEZ   +3 more
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Thiols and the diazo group in photoaffinity labels

Biochemical and Biophysical Research Communications, 1980
The photoactivable carbene precursor, 2-diazo-3,3,3-tri-fluoro-propionyloxy group, has been introduced recently for light-induced covalent crosslinking in studies of protein-phospholipid interactions in biomem-branes. The diazo group in this reagent has now been shown to undergo reduction in the dark by a number of thiols (dithiothreitol, 2 ...
Y, Takagaki, C M, Gupta, H G, Khorana
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Phthalimidomethyl Group. A New Protecting Group of Thiols

Chemistry Letters, 1994
Abstract Phthalimidomethyl group is employed as a protecting group of thiols. This group can be introduced to thiols under mild reaction conditions and be removed by treatment with hydrazine hydrate followed by mercuric acetate or cupric acetate.
Young-Dae Gong, Nobuharu Iwasawa
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