Another citation

doc/development/open-questions/index.mdwn

@@ -83,4 +83,5 @@ Discussion of metacognitive strategies that could have computer aides.
        18% of proteins, but there is also another effect of protein length that is
        correlated with the presence of a disulfide bond. Further information on this:
         + [[Frequency of cysteine residue in proteins - Human Homo sapiens - BNID 103538|https://bionumbers.hms.harvard.edu/bionumber.aspx?s=n&v=2&id=103538]]
+        + [[Fraction of protein cysteines engaged in disu - Human Homo sapiens - BNID 103536|https://bionumbers.hms.harvard.edu/bionumber.aspx?s=n&v=3&id=103536]]
         + [[Occurrence of protein disulfide bonds in different domains of life: a comparison of proteins from the Protein Data Bank - Protein Engineering, Design and Selection - Oxford Academic|https://academic.oup.com/peds/article/27/3/65/1518881]]