A synthetic gene for human angiogenin was cloned into pRTang under con
trol of the Proteus mirabilis recA promoter. After induction with mito
mycin C, Escherichia coil cells transformed with pRTang produced an ad
ditional 14.2-kDa protein. According to electrophoretic and immunochem
ical analyses, this protein was identical to human angiogenin.