ICU2 (INCURVATA2); DNA-directed DNA polymerase. Identical to DNA polymerase alpha catalytic subunit (POLA) [Arabidopsis Thaliana] (GB:Q9FHA3); similar to EMB2780 (EMBRYO DEFECTIVE 2780), DNA-directed DNA polymerase [Arabidopsis thaliana] (TAIR:AT5G63960.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO71866.1); similar to DNA polymerase alpha catalytic subunit (GB:O48653); similar to putative DNA polymerase alpha catalytic subunit [Oryza sativa (japonica cultivar-group)] (GB:BAD81999.1); contains InterPro domain DNA-directed DNA polymerase, family B, exonuclease; (InterPro:IPR006133); contains InterPro domain Polynucleotidyl tr