H-Cys-OH + H-Ser-Asn-Leu-Ser-Thr-Cys-Val-Leu-Gly-Lys-Leu-Ser-Gln-Glu-Leu-His-Lys-Leu-Gln-Thr-Tyr-Pro-Arg-Thr-Asn-Thr-Gly-Ser-Gly-Thr-Pro-NH2 (inter disulfide bridge between Cys1 and -Cys2 in two chains)
Descrição
1-2 Hydrolysis-Calcitonin é uma impureza de degradação caracterizada por clivagem peptídica específica gerada por hidrólise do anel N-terminal durante processos de síntese e armazenamento. A identificação e quantificação exigem técnicas analíticas de alto desempenho como HPLC acoplado a espectrometria de massa e fragmentação por MS/MS para mapear modificação de resíduos e pontos de corte. Estudos de estabilidade forçam condições de pH e temperatura para elucidar vias de formação e cinética de conversão. O perfil analítico desta impureza é crítico para desenvolvimento de métodos de controle de qualidade, estabelecimento de limites de aceitação e avaliação do impacto na pureza e segurança do produto final.
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