We would like to assess the chitinase activity in fish mucus sample, and have started to work with a chitinase assay kit from Sigma. Unfortunately, this one is out of stock since several monthes... Even if Sigma regularly informs us of new dates of delivery, nothing is coming and the manufacturer seems to not produce the reference anymore... If anyone could indicate a way to get out from this cul-de-sac: any other providers or any other methods able to readily detect and measure the chitinase activity of biological samples, it would be great!

Thank you in advance!

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