New, radiatively generated, LO quark (u,d,s,c,b) and gluon densities in real photon are presented. We [1] perform a global fit, based on LO DGLAP evolution equations, to all available data for the structure function F₂^\gamma (x,Q²). We adopt a new theoretical approach called ACOT(\chi ) to deal with heavy quark thresholds (CJKL model). For comparison we perform a standard fit using the Fixed Flavour Number Scheme (FFNS_cjkl model), updated with respect to previous fits of this type. We show the superiority of the CJKL model over the FFNS_cjkl one and other LO parton parametrizations for F₂^\gamma (x,Q²). Both our models describe equally well the gluon density extracted from HERA data.

PACS numbers: 12.38.Aw, 14.70.Bh, 14.65.Dw, 14.65.Fy