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Sialidase and hyaluronidase production by the wild-type, mutant and complemented strains.

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posted on 2013-09-04, 01:29 authored by Thomas J. Hiscox, Paul F. Harrison, Anjana Chakravorty, Jocelyn M. Choo, Kaori Ohtani, Tohru Shimizu, Jackie K. Cheung, Julian I. Rood

Quantitative assays were carried out to determine the relative amount of extracellular enzyme production by the wild-type, mutant and complemented strains at time of inoculation and 4 h and 8 h post-inoculation (corresponding to exponential and stationary growth phases, respectively). Sialidase assays were performed using culture supernatants from cultures grown in Todd-Hewitt broth (A). Hyaluronidase activity was determined using the cell lysates from cultures grown in TPYG (B). All results are given as the average of three biological replicates (± SEM) for sialidase assays and six biological replicates for hyaluronidase assays; the asterisk (*) denotes a statistically significant difference (p≤0.05) as determined by the student’s t-test.

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