抄録
DNA-synthesis stimulatory activity was found in some tryptic fragments of human β-casein by using BALB/c3T3 cells, and two of them were identified as the β-casein fragments of Arg[l] to Lys[18] (β-CN(f1-18)) and of Gln[105] to Lys[117] (β-CN(f105-117)).