the main proteins found along development were immunoglobulin g , transferrin , alpha-fetoprotein , serum albumin , ovalbumin , prealbumin , and an unidentified component . alpha-fetoprotein was found to be the major protein at 4-16 days , and serum albumin at 17-19 days of development .
C0032923
prealbumin
C0036773
serum albumin