Table 2.
Imperacalcin-based secondary structure prediction
CalcinsSecondary structure (amino acids)
β sheet1 (8–10)β sheet2 (20–22)β sheet3 (30–33)3/10-helix (13–15)
OpCa1  KRC KCK RCR NND 
OpCa2  KRC KCK RCR NND 
MCa  KLC KCK RCR NKD 
IpCa  KRC KCK RCR DND 
HmCa  KLC KCK RCR DKD 
VjCa  KLC – RCR NND 
UrCa  KLC SCK RCR NKD 
HdCa  QRC KCS RCR NKD 

Three β sheets (8–10, 20–22, and 30–33) and one 3/10-helix (13–15) are predicted for all calcins except vejocalcin, which lacks the β2 sheet. HdCa, hadrucalcin; HmCa, hemicalcin; IpCa, imperacalcin; MCa, maurocalcin; OpCa1, opicalcin1; OpCa2, opicalcin2; UrCa, urocalcin; VjCa, vejocalcin.

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