The Difference of Amino Acid Profiling from Two Morphological Purple Sweet Potatoes from Kawi Mountain Cultivars, East Java, Indonesia

Indonesia is one of the main commercial producers of sweet potatoes. Previous study has presented well documented anthocyanin content of Purple Sweet Potatoes (PSP) from local cultivar in Indonesia. However, research about amino acids profiling of local cultivar PSP as high commodities in Kawi Mountain region has not undertaken. This study was explored amino acids profiles in two morphological PSP cultivated in Kawi Mountain region, Ngajum Village, Wonosari Subdistric, Malang Regency, East Java, Indonesia. Fresh storage roots were cleaned with running water and shade dried. The analysis was conducted at PT.Saraswanti Indo Genetech, Bogor, Indonesia. Method of UPLC was used for identification of Ser, Glu, Phe, Ile, Val, Ala, Arg, Gly, Lys, Asp, Leu, Tyr, Pro, Thr, His, Cys and Met; while tryptophan was analyzed using HPLC method. The five largest amino acids in dark-purple skin and flesh PSP were Glu 565.75 mg/kg, Asp 479.74 mg/kg, Arg 413.54 mg/kg, Ala371.87 mg/kg and Leu 336.67 mg/kg, whereas white flesh and purple skin PSP contained Glu 653.67 mg/kg, Asp 447.60 mg/kg, Arg 314.41 mg/kg, Lys 278.77 mg/kg and Leu 256.97 mg/kg. Future research is needed to investigate the health benefit of amino acids content in PSP from Kawi Mountain cultivar.