What's the difference between protein and proteolysis?

Protein


Definition:

  • (n.) A body now known as alkali albumin, but originally considered to be the basis of all albuminous substances, whence its name.

Example Sentences:

  • (1) All mutant proteins could associate with troponin I and troponin T to form a troponin complex.
  • (2) By electrophoresis and scanning densitometry, actin was found to constitute about 4% to 6% of the total cellular protein in the human corneal epithelium.
  • (3) Comparison of the S100 alpha-binding protein profiles in fast- and slow-twitch fibers of various species revealed few, if any, species- or fiber type-specific S100 binding proteins.
  • (4) Standardization is possible after correction by the protein content of each individual section.
  • (5) The hypothesis that proteins are critical targets in free radical mediated cytolysis was tested using U937 mononuclear phagocytes as targets and iron together with hydrogen peroxide to generate radicals.
  • (6) These studies led to the following conclusions: (a) all the prominent NHP which remain bound to DNA are also present in somewhat similar proportions in the saline-EDTA, Tris, and 0.35 M NaCl washes of nuclei; (b) a protein comigrating with actin is prominent in the first saline-EDTA wash of nuclei, but present as only a minor band in the subsequent washes and on washed chromatin; (c) the presence of nuclear matrix proteins in all the nuclear washes and cytosol indicates that these proteins are distributed throughout the cell; (d) a histone-binding protein (J2) analogous to the HMG1 protein of K. V. Shooter, G.H.
  • (7) Following central retinal artery ligation, infarction of the retinal ganglion cells was reflected by a 97 per cent reduction in the radioactively labeled protein within the optic nerve.
  • (8) Increased dietary protein intake led to increased MDA per nephron, increased urinary excretion of MDA, and increased MDA per milligram protein in subtotally nephrectomized animals, and markedly increased the glutathione redox ratio.
  • (9) The presence of O-glycosidic linkages between carbohydrate and protein in the DF3 antigenic site was further supported by the presence of NaBH4-sensitive sites.
  • (10) Cyclic AMP stimulated phosphorylation by [gamma-32P]ATP of two proteins of apparent Mr = 20,000 and 7,000 that were concentrated in sarcoplasmic reticulum, but the stimulation was markedly dependent on the presence of added soluble cyclic AMP-dependent protein kinase.
  • (11) The quaternary structure of ribonucleotide reductase of Escherichia coli was investigated, with the use of purified B1 and B2 proteins and bifunctional cross-linking agents.
  • (12) This induction is sensitive to actinomycin D but not to protein synthesis inhibitor puromycin, indicating an effect of estradiol at the transcriptional level, possibly mediated by the estrogen receptor.
  • (13) The promoters of the adenovirus 2 major late gene, the mouse beta-globin gene, the mouse immunoglobulin VH gene and the LTR of the human T-lymphotropic retrovirus type I were tested for their transcription activities in cell-free extracts of four cell lines; HeLa, CESS (Epstein-Barr virus-transformed human B cell line), MT-1 (HTLV-I-infected human T cell line without viral protein synthesis), and MT-2 (HTLV-I-infected human T cell line producing viral proteins).
  • (14) This clinical improvement was also associated with a decrease of erythrocyte sedimentation rate (p less than 0.001), decrease of C-reactive protein (p less than 0.0001) and with improvement of anaemia (p less than 0.05).
  • (15) The mobility on sodium dodecyl sulfate-polyacrylamide gel electrophoresis is anomalous since the undenatured, cross-linked proteins have the same Stokes radius as the native, uncross-linked alpha beta gamma heterotrimer.
  • (16) We also show that the gene of the main capsid protein is expressed from its own promoter in an Escherichia coli strain.
  • (17) Western blot analysis of these mitochondria using an antibody against carnitine palmitoyltransferase II purified from beef heart demonstrates a 68-kDa protein, which under ischemic conditions apparently is decreased by 2 kDa.
  • (18) Fifteen sera ICA-IgG and ICA-protein A positive with high titres remained positive thereafter.
  • (19) Patient or fetal cord serum is commonly used as a protein supplement to culture media used in in-vitro fertilization (IVF).
  • (20) Using the oocyte system to express size-fractionated mRNA, we have also determined that the mRNA coding for this protein is between 1.9-2.4 kilobases in length.

Proteolysis


Definition:

  • (n.) The digestion or dissolving of proteid matter by proteolytic ferments.

Example Sentences:

  • (1) This indicated that proteolysis at Lys1313-Glu also proceeded in native alpha 2M.
  • (2) By contrast, at 100 microM insulin concentration, both enhancers accelerated insulin proteolysis.
  • (3) It was found that these Hageman factor fragments promoted rapid proteolysis of one-chain factor VII to a more active two-chain form.
  • (4) Lengthy digestions with both proteases produced fragments of the receptor which appeared to be resistant to further proteolysis.
  • (5) By a mechanism as yet unknown, but most likely a limited proteolysis, the secreted inhibitor is liberated from the high molecular weight precursor.
  • (6) Phosphorylation or partial proteolysis of the kinase, which are known to activate phosphorylase conversion, also activate the ATPase activity.
  • (7) The effect of controlled proteolysis of intrinsic proteins was also tested.
  • (8) The disc-gel patterns of the 8 m urea-soluble proteins showed that C. perfringens caused extensive proteolysis in pig muscle and a lesser extent of proteolysis in rabbit muscle.
  • (9) A23187, KC1, sucrose, and 8-(diethylamino)octyl-3,4, 5-trimethoxybenzoate hydrochloride increase proteolysis while tetracaine, verapamil, and low extracellular calcium caused significant decreases.
  • (10) Two main polypeptides, Mr about 27,000 and 21,000, were protected against pepsin proteolysis when a mixture consisting of asolectin vesicles and 125I-labeled tetanus toxin was subjected to a pH drop from 7.2 to 3.0.
  • (11) This altered region spans the normal site of autocatalytic proteolysis that occurs at the same time as (enzymatic) activation of prochymosin at acidic pH.
  • (12) The polypeptides that remain associated with the membranous structure after proteolysis were detected by sodium dodecyl sulfate gel electrophoresis.
  • (13) This system should allow studies on the modulation of proteolysis in intact lung under defined conditions.
  • (14) Proteolysis at the latter sequence has not been previously reported in intact secretory granules.
  • (15) Since the HPV-16 E6-promoted degradation involves the ubiquitin-dependent proteolysis pathway, specific mutations were made in the amino terminus of p53 to examine whether the E6 targeted degradation involved the N-end rule pathway.
  • (16) Proteolysis studies of purified VIII:C using thrombin and activated protein C have suggested that the 92,000- and 80,000 (or 72,000)-mol wt polypeptides comprise activated VIII:C. We have now used seven monoclonal antibodies raised against purified VIII:C to construct a preliminary epitope map of these VIII:C polypeptides.
  • (17) Proteolysis and isolation of the labeled peptides using reverse phase HPLC and subsequent Edman sequence analysis detected and identified the thionitrobenzoate adducts of each of the three cysteinyl peptides of chloroperoxidase.
  • (18) Whole body protein turnover was accelerated by acidosis as reflected in a 70% increase in proteolysis and a 55% increase in protein synthesis.
  • (19) These results provide structural and functional evidence that CaM and CDP-I act synergistically in the regulated proteolysis of fodrin.
  • (20) The data do not support the suggestion that the toxin is derived by proteolysis of a protoxin precursor.

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