1.

The signal sequences are typically _______ residues long, rich in _____ charged residues such as arginines as well as hydroxyl residues such as serines and threonines, but devoid of ______ charged residues.(a) 28 to 80, positively, negatively(b) 300 to 800, negatively, positively(c) 28 to 80, negatively, positively(d) 300 to 500, positively, negativelyI have been asked this question in an interview.My doubt stems from Protein Sorting in chapter Functional Genomics & Proteomics of Bioinformatics

Answer»

Correct answer is (a) 28 to 80, POSITIVELY, negatively

To explain: They have the tendency to FORM amphiphilic α-helices. These targeting SEQUENCES are cleaved once the precursor proteins are inside the MITOCHONDRIA.



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