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Nature 421 , 182187 (2003)

The confluent coverslips were then aseptically transferred to new six well plates containing 900 serum free DMEM

angiotensin IV analogue Sequence (formal name): N-hexanoic-Tyr-Ile-(6) aminohexanoic amide IUPAC name: 6-[(2S,3S)-2-[(2S)-2-hexanamido-3-(4-hydroxyphenyl)propanamido]-3-methylpentanamido]hexanamide Synonyms: PNB-0408, Hexanoyl-Tyr-Ile-Ahx-NH 2 , MM-201 (older designation) CAS Number: 1401708-83-5 Molecular Formula: C 27 H 44 N 4 O 5 Molecular Weight: 504.66 g/mol Solubility: slightly soluble in DMSO and methanol

4i, the positive control (PC) group exhibited an intense red coloration, suggesting substantial erythrocyte lysis and hemoglobin release

Absorption differences: injection vs topical Subcutaneous injection absorption: Rapid absorption into bloodstream Peak plasma concentration: 15-30 minutes 80-90% bioavailability Reaches target tissues quickly Systemic distribution Topical application absorption: Slower penetration through skin barrier Peak tissue concentration: 1-3 hours 5-15% bioavailability (most doesn't penetrate) Primarily local effects (skin where applied) Minimal systemic exposure Absorption comparison table: Why injection more effective: Direct systemic delivery Reaches all tissues Predictable dosing Lower total dose needed Better for body-wide effects When topical makes sense: Face/neck cosmetic use only Avoiding injections Already using skincare routine Combining both approaches (injection + topical) See our GHK-Cu 50mg copper peptide dosage guide for injection protocols