Design a Western Blot for GHRH

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 isoforms 1 and 2. Isoform 2 lacks residue 103 in UniProt numbering. That one-residue difference may be too small to resolve on a blot; separate bands would require evidence beyond the isoform annotation.

PTM · The linked UniProt record describes protein features. A modification annotation alone does not demonstrate a visible shift; retain any condition or experimental qualifier attached to it.

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 · GHRH is a small, secreted protein with a predicted mass of 12.4 kDa, and processing may yield smaller products. Choose transfer conditions and a membrane suited to retaining low-mass species, then check retention with an appropriate low-mass marker.

Blocking · Standard workflow guidance: follow the A01699-1 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 · Quantify a consistently identified species across samples. The 12.4 kDa prediction describes the full sequence, while GHRH has annotated processing and two isoforms. Avoid combining bands unless evidence shows they represent the same species.

Interpretation · The 12.4 kDa prediction is for the 108-residue sequence. GHRH has a signal peptide at 1..20 and a propeptide at 21..31, so processing can produce smaller species. These features alone do not explain the reported 13–15 kDa apparent band; identify the detected species before assigning a cause.

UniProt lists a signal peptide at 1..20, a propeptide at 21..31, and cleavage on a pair of basic residues. A detected band could represent a precursor or a processed product. Interpret its size in light of which sequence the antibody recognizes.

Yes. UniProt lists leucine amide at position 75, using its sequence numbering. It lists no glycosylation sites. Amidation is a useful clue when identifying a processed product, but the annotation alone does not establish a visible band shift.

Compare each band with the 108-residue precursor and the annotated signal-peptide, propeptide, and basic-residue processing. Isoform 2 lacks residue 103, and residue 75 is amidated. None of these annotations alone identifies an unexpected band or proves a visible mobility shift.