Abstract
To investigate the expression and functions of cyclin-dependent kinase 2-associated protein 1 (cdk2ap1) screened by suppression subtractive hybridization in chicken embryo development, a pair of primers was designed to amplify the cdk2ap1 fragment by RT-PCR and subsequently the fragment obtained was cloned into the plasmid pGEM-T. Sense and antisense probes labeled with digoxigenin were generated using SP6 and T7 RNA polymerases, respectively, and used to examine cdk2ap1 expression in chicken embryos of both sexes by whole-mount in situ hybridization. In both sexes, cdk2ap1 was expressed in the head mesenchyme, rhombencephalon, optic vesicles, spinal neural tube, and forelimb of 4.0-day-old embryos and the expression in males was significantly higher than that in females. In addition, in the genital ridge and hindlimb of the 4.0-day-old chicken embryo, cdk2ap1 was obviously expressed in the males but not in females. It is supposed that cdk2ap1 may play a role in the sexual differentiation and development of gonad of chicken embryo.
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