PDC-109 is a major
bovine
Bovines (subfamily Bovinae) comprise a diverse group of 10 genera of medium to large-sized ungulates, including cattle, bison, African buffalo, water buffalos, and the four-horned and spiral-horned antelopes. The evolutionary relationship be ...
seminal plasma protein.
In bovine
semen
Semen, also known as seminal fluid, is an organic bodily fluid created to contain spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the female ovum. Semen ...
its concentration is about 15–20 mg/ml, which comprises about 60 percent of total proteins present in the bovine seminal plasma.
A characteristic feature of this protein is that it contains two fibronectin type 2 (Fn2) domain. Each domain in this protein binds to lipid head group with cation-pi interaction.
References
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Reproduction in mammals