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This article has been cited by other articles in PMC. Abstract Background The objective of the present study was to isolate and purify the protein fraction s of llama seminal plasma responsible for the ovulation-inducing effect of the ejaculate. Methods Semen collected from male llamas by artificial vagina was centrifuged and the seminal plasma was harvested and stored frozen. Seminal plasma was thawed and loaded onto a Type 1 macro-prep ceramic hydroxylapatite column and elution was carried out using a lineal gradient with mM sodium phosphate. Three protein fractions were identified clearly Fractions A, B, and C , where a prominent protein band with a mass of 14 kDa was identified in Fraction C. Fraction C was loaded into a sephacryl gel filtration column for further purification using fast protein liquid chromatography FPLC.
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