Design a Western Blot for FBLN5

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 · Only one isoform is supplied, with no alternative sequence. Do not assign separate bands to annotated isoforms on this evidence; assess sample preparation and band identity before interpreting extra bands.

PTM · UniProt lists N-linked glycosylation at asparagines 283 and 296, using its 448-residue sequence numbering. Check the numbering convention before comparing these sites with antibody or paper annotations. The listed sites do not, by themselves, explain a particular band difference.

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 M02317-1 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 50.2 kDa prediction refers to the 448-residue sequence. UniProt lists a signal peptide at residues 1..23 and N-linked glycosylation sites at 283 and 296. Processing and glycosylation may affect apparent mass, but these features alone do not establish a visible shift; no observed band size was supplied.

FBLN5 is secreted and localizes to the extracellular space and extracellular matrix, where it co-localizes with elastin in elastic fibers. Consider the collected medium and extracellular matrix fraction when interpreting a weak cell-lysate signal. Compare equivalent fractions across samples.

UniProt reports FBLN5 as a monomer and a homodimer, with homodimerization in the presence of Ca(2+). A higher-mass band could warrant checking whether sample conditions preserve oligomers, but band position alone cannot establish that it is a dimer.

UniProt lists 17 disulfide bonds. Record whether samples were reduced when comparing blots, because disulfide-dependent structure can affect migration or antibody recognition. The feature count does not predict a specific band shift.

Use the same sample fraction and preparation conditions across samples. FBLN5 is secreted and present in the extracellular matrix, so a change in cell-lysate signal alone may not reflect a change in total FBLN5. Quantify a consistently identified band under matched conditions.