F9, F09, F.IX, F 9 or F-9 can be one of:
And also :
Factor IX (or Christmas factor) (EC 3.4.21.22) is one of the serine proteases of the coagulation system; it belongs to peptidase family S1. Deficiency of this protein causes hemophilia B. It was discovered in 1952 after a young boy named Stephen Christmas was found to be lacking this exact factor, leading to hemophilia.
It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.
Factor IX is produced as a zymogen, an inactive precursor. It is processed to remove the signal peptide, glycosylated and then cleaved by factor XIa (of the contact pathway) or factor VIIa (of the tissue factor pathway) to produce a two-chain form where the chains are linked by a disulfide bridge. When activated into factor IXa, in the presence of Ca2+, membrane phospholipids, and a Factor VIII cofactor, it hydrolyses one arginine-isoleucine bond in factor X to form factor Xa.
Factor IX is inhibited by antithrombin.
Factor IX expression increases with age in humans and mice. In mouse models mutations within the promoter region of factor IX have an age-dependent phenotype.
Chorus:
Girl I get dat cold sweat
Creepin' up on me
I ache when you shake it
Girl I'm just a freak
Yeah, you set dat cold sweat
Trippin' on me
Burnin' with the fever
Girl you're killing me
Girl you're kinda freaky
Got something 'bout your smile
And when you bounce it up and down
I can't believe my eyes
I got to give you respect
Cos you know how to tease
Keep on walking I'll keep talkin'
You would not believe
Bridge:
What I would do
With a girl like you
Keep your body rockin'
I ain't gonna stop I just want you
And you know
It's shockin' when you rock it
I'm a sick, sick man cos
(Chorus)
Girl I'm just a freak
In need of therapy
I count the ounce in every bounce
And I just want to feast
I love the way you work it
I love the way you grind
Ya got da funk in every pump
If you could read my mind
Bridge
(Chorus)
Down
You're burnin' me down (x3)
I love the way shake now
Love the way you break now
Keep it comin' baby
I don't wanna hesitate now
You got me hooked every look makes me freeze
180 degrees you make me buckle at my knees
Crazy rump shaker sexy move maker
Baby bring it on
Better sooner than later
I feel a cold sweat creepin' up on me
We gotta get it on
Tell me what it's gonna be
(Bridge)
(Chorus until fade)