The phrase "a was frequently" is not correct and usable in written English.
It appears to be a fragment and lacks context, making it unclear what is intended.
Example: "A was frequently mentioned in the report, but the details were vague."
Alternatives: "was often" or "was regularly".
This OspA (for outer surface protein A) was frequently spotted by immune cells from treatment-resistant patients but recognized only uncommonly by cells from those whose arthritis responded to treatment.
We previously demonstrated that in fMBC, the tumour suppressor RASSF1A (RAS association domain family protein 1 isoform A) was frequently downregulated, because it is hypermethylated in its promoter and consequently less expressed than in fFBC (Pinto et al, 2013).
It has been reported that p16 INK 4 a was frequently silenced by promoter hypermethylation in esophageal adenocarcinoma [ 7, 8].
The number of A- operations, N A, is frequently called adder cost.
However, in most centers (71.4%), OBT-A was frequently associated with one or more additional prophylactic treatments (Table 3).
Expression of MIC-A was frequently found in all tumors studied and resulted in a statistically significant favorable patient's prognosis in colorectal cancer, while it was not statistically significantly associated with outcome in breast cancer and ovarian cancer [ 8- 16, 16].
Overexpression of CENP-A is frequently observed in HCC.
The activity and expression of LDH-A is frequently increased in different cancers.
Nonetheless the accusation of being a spendthrift was frequently levied at him by his contemporary critics.
As a result she was frequently confused by the physical signs of her body's deterioration.
As a composer Holst was frequently inspired by literature.
