摘要：

We report on a measurement of the proton structure functionF 2 in the range 3.5×10?5≤x≤4×10?3 and 5 GeV2≤Q 2≤15GeV2 at theep collider HERA operating at a centre-of-mass energy of √s=300GeV. The rise ofF 2 with decreasingx observed in the previous HERA measurements persists in this lowerx andQ 2 range. TheQ 2 evolution ofF 2, even at the lowestQ 2 andx measured, is consistent with perturbative QCD.

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