It is common to use protein concentrations of Ki-67 as a proliferation marker although its function is unknown; it is present at highest concentration in the S phase but also in the G1 G2 phase [ 20].
CXCL10 is a chemokine that attracts activated T cells through its receptor, CXCR3, and it is present at higher concentrations in the CSF of multiple sclerosis patients with active demyelinating attacks when compared to neurological controls (Sorensen et al., 2001).
Yet, despite its recognized importance, supervision is often lacking in quality if it is present at all.
Although yeast telomerase is constitutively expressed, it is present at low levels, which probably explains why its detection by in vitro assays lagged behind other organisms.
Cohesin is thought to help hold loops together because it is present at origins, interacts with the pre-RC, and its absence slows S-phase (Guillou et al. 2010).
Authors speculate that if a SNP is considered a statistically significant but "weak" risk factor for the disease and it is present at similar frequency in centenarians and in patients, its biological relevance can be assumed as negligible.
Sometimes it is present at or before birth.
In general, this means that labeling, when it is present at all, tends to be accurate.
Melody, when it is present at all, is fragmentary, suggesting the ambience and contours of folk songs.
(A common ingredient found in many products, formaldehyde is a recognized carcinogen if it is present at high levels).
Hydrocephalus is often congenital, meaning that it is present at birth; however, it may be acquired and thus occurs later in life.
