SDS–PAGE of fresh, acidic and neutralized buffalo milk khoa during storage at a 30 °C/7 days, b 5 °C/21 days. Where, (i) FBMK stored at 30 °C/7 days. (ii) ABMK stored at 30 °C/7 days. (iii) NBMK stored at 30 °C/7 days. (iv) FBMK stored at 5 °C/21 days. (v) ABMK stored at 5 °C/21 days. (vii) NBMK stored at 5 °C/21 days. FBMK fresh buffalo milk Khoa, ABMK acidic buffalo milk Khoa, NBMK neutralized buffalo milk Khoa