Design a Western Blot for CHMP2B

Band shift · Use the separately labelled calculated mass and catalog-observed evidence above. A sequence annotation does not establish an observed migration shift. Verify target identity with orthogonal controls.

Isoforms · UniProt lists two isoforms. In isoform 2, the canonical residues 1–42 are replaced by a single methionine, so its sequence is shorter. An antibody against that N-terminal region may miss isoform 2; an antibody against a shared region can help assess both. The features do not establish their apparent band positions.

PTM · UniProt lists N-acetylalanine at position 2 and phosphoserine at position 199, using canonical-sequence coordinates. These features alone do not show that either modification produces a resolvable band shift. Check whether the antibody detects the relevant form before assigning a band to either modification.

Induction · No general induction response is established by this guide. A pathway or gene-set association is not evidence of induction in a particular specimen. Verify the relevant treatment and control in a target-specific experiment.

Transfer · Standard workflow guidance: verify transfer efficiency for the intended target size before interpreting a weak signal. Use total-protein assessment and optimize transfer for the membrane, gel and apparatus; the labelled catalog values take precedence.

Blocking · Standard workflow guidance: follow the M01935 datasheet where specified. Otherwise compare 5% milk or 5% BSA in TBST; for a phospho-specific assay start with BSA. Optimize background and specific signal with matched controls.

Quantitation · Standard workflow guidance: quantify only a validated target band within the linear exposure range. Use consistent sample preparation and loading, retain biological replicates, and avoid interpreting saturation or loading differences as regulation.

Interpretation · The supplied apparent band is approximately 28 kDa, while the predicted mass is 23.9 kDa. The listed features do not establish the cause of this difference. Do not assign the shift to a modification or isoform without additional evidence.

CHMP2B is listed in the cytosol and at the late endosome membrane as a peripheral membrane protein. Use the same sample fraction and preparation across comparisons, since different fractions could contain different amounts of CHMP2B. Keep antibody recognition of the two listed isoforms consistent with the comparison you intend.

CHMP2B is a probable ESCRT-III core component, and ESCRT-III components are thought to multimerize. That annotation alone does not identify a higher molecular weight Western-blot band as a CHMP2B multimer. Verify unexpected bands before assigning them to assembly.

Consider the two listed isoforms and whether the antibody targets the altered N-terminal region. The canonical sequence has modifications at positions 2 and 199, but their presence does not establish a visible shift. The approximately 28 kDa observed band also differs from the 23.9 kDa prediction, so mass alone cannot identify an unexpected band.