Lysozyme activity in the plaice (Pleuronectes platessa L.)

Seasonal trends in serum lysozyme activity and total protein concentration in dab (Limanda limandaL.) sampled from Lyme Bay, U.K.

“…This value was somewhat higher than the optimal value of pH 5·4 for lysozyme activity in plaice serum (Fletcher & White, 1973). Published data for Values as mean S.E.…”

Functions for fish mucus

“…The fish skin surface is not ciliated and the mechanism whereby the products of individual goblet cells fuse to produce uniform slime layers is unknown. In common with the situation seen in terrestrial slugs (Deyrup-Olsen et al, 1992), some mucous granules appear to be released from goblet cells in an unbroken state (Fletcher and White, 1973), although more normally it appears that granules burst when released (Whitear, 1971), as occurs in mammalian systems (Davis et aL, 1992).…”

“…The best known is lysozyme (N-acetyl muramide glycanohydralase) which is able to lyse Gram-negative bacteria and may have an influence on fungal cell walls (Fletcher and Grant, 1968;Fletcher and White, 1973). Cell lysis is also accomplished by complement, following activation by immunoglobulins or other materials.…”

In vivo effects of β-glucan and LPS on regulation of lysozyme activity and mRNA expression in Atlantic salmon (Salmo salar L.)

“…The presence of lysozyme activity in plasma, skin mucus, organs and fish egg has been well documented in various fish species [5,[19][20][21][22][23]. In rainbow trout and Japanese flounder (Paralichthys olivaceus), the lysozyme gene is transcribed in di#erent organs and two types of cDNA has been identified in trout kidney and liver [24,25].…”