All analyses for amino-acids are in g/16 g N, of the crude protein in the pollen sample.
In this book it has been assumed that these analyses are a tolerable approximation of percentages of the amino-acids contained in the respective proteins within the pollen samples.
Crude protein is reported as a percentage (%) of the total crude protein within the pollen sample.
The tables 2 - 44 contain the percentage crude protein of the pollen and the percentage amino-acids in the crude protein contained in the pollen from the respective floral sources.
The results of the analysis were normalised to 82.5% recovery, so comparisons can be made between samples collected at different times and places.
The chemical analysis of the essential amino-acid
tryptophan is very difficult. In most pollen samples tested, tryptophan
was not included in the test. However, when this amino-acid was specially
tested for, its level were always well above the critical 1% required
by bees, as indicated by De Groot. (See Appendix - Pollen protein for
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