The phrase "as a normal expression" is correct and usable in written English.
It can be used to indicate that something is a typical or standard way of expressing an idea or sentiment.
Example: "In everyday conversation, saying 'thank you' is considered as a normal expression of gratitude."
Alternatives: "as a common phrase" or "as a typical expression".
YKS treatment decreased the age-related increase in aggrecan expression as well as normal expression in young rats.
Affecting most post-adolescent women of all races, cellulite (gynoid lipodystrophy) – the dimpling of skin primarily on thighs and buttocks – can be considered as a normal macroscopic expression of the female skin (Müller and Nürnberger 1972; Pavicic et al 2006).
Moreover, recent data indicate the cross-talk between ERs and EGFR/IGFR signaling pathways causing a transformation of cell functions as well as deregulation on normal expression pattern of matrix molecules.
As a benchmark for normal expression levels, we also aligned reads to an unaltered genome using TopHat and measured FPKM of all RefSeq genes using Cufflinks [ 17].
The epithelium of fallopian tubes (the normal serous epithelium of Müllerian origin) and ovarian surface epithelium (OSE) were used as a reference of normal expression for both proteins.
As a reference for normal expression level the RNA isolated from 15 male age-matched gynecomastia specimens was pooled into four control samples ("mix 1 - 4", made up of three or four individual RNA preparations, respectively) because the average RNA yield was quite low due to the limited number of epithelial cells present.
Furthermore, an altered expression may also be related to its variability as its normal expression may have a very broad range.
bcl-2 was scored semiquantitatively (0+ to 3+) judging the cytoplasmatic expression of bcl-2, but tumours with 2+ and 3+ staining were regarded as having normal expression.
Since mutant TP53 proteins generally have a longer half-life than wild-type TP53 protein, which leads to their nuclear accumulation (Finlay et al, 1988), tumours with more than 20% of nuclear TP53-positive tumour cells were classed as showing aberrant expression, all others being classed as showing normal expression.
Using previously reported criteria (Yoshikawa et al, 1999; Angèle et al, 2000), we compared the tumours to the adjacent normal epithelium (in which most cells show positive staining for ATM and BRCA1) and classified those tumours with more than 25% of ATM- or BRCA1-negative tumour cells as showing reduced expression of these proteins, all others being classed as showing normal expression.
