Abstract: In order to explore lysozyme activity in different parts of eggs, egg internal content except yolk membrane and chalaza was harvested using syringe and light shining device without damage. Lyozyme activities in different parts of eggs were determined. The results indicated that outer shell albuginea and yolk did not contain lysozyme. Lysozyme activity in yolk membrane was the highest, which was up to 9764.290 U/mL, and then followed by 4172.86 U/mL in chalazae. Loysozyme activities in four parts such as eggshell membrane adhesion albumen, outer thin albumen, inner thick albumen and inner thin albumen were 378.714, 330.238, 354.929 U/mL and 245.381 U/mL, respectively. No lysozyme was observed in outer shell membrane and yolk. Moreover, different lysozyme activities in different locations of eggs were observed. The sharp-middle and blunt end revealed the highest lysozyme activity. The tip end and middle parts of eggs revealed lower lysozyme activity.

Key words: egg, lysozyme activity, distribution