What's the difference between peptone and propeptone?

Peptone

Definition:

(n.) The soluble and diffusible substance or substances into which albuminous portions of the food are transformed by the action of the gastric and pancreatic juices. Peptones are also formed from albuminous matter by the action of boiling water and boiling dilute acids.
(n.) Collectively, in a broader sense, all the products resulting from the solution of albuminous matter in either gastric or pancreatic juice. In this case, however, intermediate products (albumose bodies), such as antialbumose, hemialbumose, etc., are mixed with the true peptones. Also termed albuminose.

Example Sentences:

(1) Microbiological investigations made by membrane filtration method on antiseptics and disinfectants demonstrated that the filtering membranes present very frequently a remarkable antimicrobial activity, even after washing with 300 ml of peptone water according to the guidelines of the Pharmacopoeia.
(2) Neither NaCl nor peptone influenced VIP levels in peripheral blood.
(3) In the absence of yeast extract or peptone, growth from low-level inocula was not observed when n-hexadecane or two oxidation products, 2-hexadecanol and 3-hexadecanone, were used as substrates.
(4) The highest enzyme activity was found in rapidly growing mycelia (glucose-NH4+ or glucose-peptone medium).
(5) The plating medium consisted of 2.0% peptone, 0.2% yeast extract, 1.0% corn starch, 7% NaCl, and 1.5% agar, with the pH adjusted to 8.0.
(6) Seventy-four of 110 strains of Pseudomonas aeruginosa tested produced detectable amounts of HCN from growth in 2% peptone or nutrient agar.
(7) Hemolytic staphylococcus was incubated at 37 degrees C in a Petri dish, on meat-peptone agar with a layer of erythrocytes on its surface.
(8) The antigenic relationship between the milk fat globule membrane (MFGM) and the hydrophobic fraction of proteose-peptone (HFPP) was demonstrated, using a mono-specific anti-HFPP antibody.
(9) In SDS-PAGE, the bands of spirosome protein derived from anaerobic cultures were more intense than those derived from aerobic cultures, either in peptone water or in Davis-Mingioli's minimal medium.
(10) The new medium, designated R2A, contains 0.5 g of yeast extract, 0.5 g of Difco Proteose Peptone no.
(11) Of the 174 samples initially positive for Salmonella, 131 (75.3%) were positive on re-examination using pre-enrichment in buffered peptone water (BPW) and selective enrichment in Rappaport-Vassiliadis medium (RV) and in tetrathionate medium according to Muller-Kauffmann (MK).
(12) Examination of fractional composition of peptone by gel-filtration and fractionation with various precipitants is recommended for rational working out of nutrient media for cultivation of cholera vibrio.
(13) Environemntal conditions which might be present in the human intestinal lumen, such as anaerobiosis, a temperature of 37 degrees C and the presence of bile salts, were examined for their effects on the growth and toxin production by Vibrio cholerae strains 569B and B1307 in Syncase and in peptone water media.
(14) However, the latter group grew in peptone-yeast extract-glucose broth, whereas the H. vaginalis strains did not grow without the addition of starch to peptone-yeast extract-glucose.
(15) Gonococci suspended in 1% proteose peptone containing 8% glycerol can be snap frozen in liquid nitrogen without detectable loss on thawing.
(16) Among the standard laboratory media used trypticase soy broth (TSB) showed the maximum production and poor yields resulted from growth in peptone water and nutrient broth.
(17) In peptone without osmotic support the cells showed a distortion of the normal membrane-wall relationship by 20 minutes.
(18) The same nutrients that increased gastrin mRNA levels caused decreased 2-hour integrated somatostatin mRNA levels; peptone (-30%), phenylalanine (-28%), and olive oil (-21%), but neither glucose nor saline, altered somatostatin mRNA levels.
(19) This, plus the fact that a chemotactic galactose mutant penetrated cores saturated with peptone medium at the same rate with or without a galactose gradient, indicates that chemotaxis may not be required for bacterial penetration through unconsolidated porous media.
(20) The specie Penicillium verrucosum var cyclopium (Westling) has showed that Media containing peptones, especially, trypticase, as a source of nitrogen and maltose or glucose as a source of carbon are most efficient for a good stimulation of the lipolytic activity.