regex match for splitstring but select "# times toskip the delimiter

See more:

C#

All,
My previous question was related to splitting the string on multiple delimiters but keep the delimiter so the output for the code below would be

MK
WVTFISLLLLFSSAYSR
GVFR
R
DTHK
SEIAHR
FK
DLGEEHFK
GLVLIAFSQYLQQCPFDEHVK
LVNELTEFAK................etc

I would like to modify so I can incorporate user-defined "missed cleavages" So for example 1 missed cleavages(at R or K) would read: Any suggestions?

MKWVTFISLLLLFSSAYSR
GVFRR
DTHKSEIAHRFK
DLGEEHFKGLVLIAFSQYLQVK

Here is the code:

string input = "MKWVTFISLLLLFSSAYSRGVFRRDTHKSEIAHRFKDLGEEHFKGLVLIAFSQYLQVK";
Regex regex = new Regex("([^KR])*[KR]");
MatchCollection ms = regex.Matches(input);
foreach (Match m in ms)
{
  Console.WriteLine(m.Value);
}