What Is a Type 1 Protein? Exploring Transmembrane, Secretion, and Collagen Types
                                
                                
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                                    5 min read                                
                            
                                Over 2,300 single-pass membrane proteins were identified in the human genome, many of which are classified as type 1 proteins. A type 1 protein can refer to different concepts depending on the biological context, including a specific class of transmembrane proteins, a bacterial secretion pathway, and the most abundant form of collagen.