Figure 1.

IR spectra of normal cervical epithelial cells. The main spectral patterns (A and B) of superficial cells are shown in the region 900 cm⁻¹–4,000 cm⁻¹ (Top) and in detail in the Middle (region 900–1,250 cm⁻¹), which also shows the mixed pattern. Bottom, the spectra of parabasal squamous and endocervical cells. Both belong to pattern B; the absence of the 1,026 cm⁻¹ peak is characteristic.