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. 2025 Mar 31;14(7):1217. doi: 10.3390/foods14071217
UNE Unenzymatized chicken bones
ALK Alkaline protease
NEU Neutral Protease
PAP Papain
BRO Bromelain
TRY Trypsin
LEU Leucine Transaminase
FLA Flavorzyme
COM Composite enzyme
DH Hydrolysis degree
TCA Trichloroacetic acid
FAA Free amino acid
IS Internal standard
RT Retention time
RI Retention index