Hb A


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Related to Hb A: HBO, Hb F, Hb A 1c

Hb A

Abbreviation for hemoglobin A.

Hb A

Abbreviation for hemoglobin A.
References in periodicals archive ?
In order to emphasize the use of Hb as the only parameter for anaemia assessment without losing the advantage of Hct measurements, the use of the three-fold conversion to equate the two measures has come into practice (6).
Isoelectric focusing showed the variant Hb to migrate anodal to Hb A. The citrate agar gel showed the Hb to migrate between Hb A and Hb F, and the HPLC peak characteristics and retention time were consistent with Hb Austin.
Factors affecting the clinical utility of Hb A ic in the presence of Hb variants include both analytical interferences and the clinical interpretation of the result.
In this study, these assays provided an ostensibly reportable Hb [A.sub.1c] value without warning that the patients appeared to not have any Hb A. Although the values labeled as Hb [A.sub.1c], obtained by using these methods, may be fairly accurate, their clinical significance may be misleading and do not reflect glycemic status accurately (Table 1).
To facilitate interpretation, results are automatically positioned with regard to the Hb A and Hb A2 fraction in the sample.
On alkaline haemoglobin electrophoresis, there is an absence of Hb A with only haemoglobins E, [A.sub.2] and F present.
Hb [A.sub.1c] is produced by nonenzymatic addition of a glucose molecule to the N-terminal valine residue on the chain of Hb A. Glycation of the N-terminal residue changes its structure and decreases the positive charge of Hb A.
For each test method, results obtained for each type of sample (homozygous Hb A, heterozygous Hb C, and heterozygous Hb S) were compared with those obtained by the CLC 330 comparison method.
Whole blood samples from individuals homozygous for Hb A (n = 43) and heterozygous for Hb C or S (n = 43 and 61, respectively) were collected in EDTA tubes.
In healthy adults, ~95% of the Hb is Hb A ([[alpha].sub.2][[beta].sub.2]) with small amounts (<3.5%) of Hb [A.sub.2] ([[alpha].sub.2][[delta].sub.2]) and Hb F ([[alpha].sub.2][[gamma].sub.2]) present.